SceneRunner.Scene.ExceptionsHandling.SceneExecutionException: One or more errors occurred.

Sentry Issue: [UNITY-EXPLORER-PY9](https://decentraland.sentry.io/issues/7710402272/)

```
Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Analytics.cpp", line 11339, in UpdateLoopAsync
...
(14 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Analytics.cpp", line 11339, in UpdateLoopAsync
...
(14 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Analytics.cpp", line 11339, in UpdateLoopAsync
...
(14 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Analytics.cpp", line 11339, in UpdateLoopAsync
...
(14 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Analytics.cpp", line 11339, in UpdateLoopAsync
...
(14 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "DCL.Plugins.cpp", line 30727, in UpdateLoopAsync
...
(11 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "Generics__14.cpp", line 26828, in UpdateLoopAsync
File "il2cpp-codegen.h", line 792, in StartUpdateLoopAsync
File "mscorlib__10.cpp", line 6043, in StartUpdateLoopAsync
File "Generics__36.cpp", line 16086, in StartAndUpdateSceneAsync
...
(10 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "Generics__14.cpp", line 26828, in UpdateLoopAsync
File "il2cpp-codegen.h", line 792, in StartUpdateLoopAsync
File "mscorlib__10.cpp", line 6043, in StartUpdateLoopAsync
File "Generics__36.cpp", line 16086, in StartAndUpdateSceneAsync
...
(10 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "Generics__14.cpp", line 26828, in UpdateLoopAsync
File "il2cpp-codegen.h", line 792, in StartUpdateLoopAsync
File "mscorlib__10.cpp", line 6043, in StartUpdateLoopAsync
File "Generics__36.cpp", line 16086, in StartAndUpdateSceneAsync
...
(10 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "Generics__14.cpp", line 26828, in UpdateLoopAsync
File "il2cpp-codegen.h", line 792, in StartUpdateLoopAsync
File "mscorlib__10.cpp", line 6043, in StartUpdateLoopAsync
File "Generics__36.cpp", line 16086, in StartAndUpdateSceneAsync
...
(10 additional frame(s) were not displayed)

Microsoft.ClearScript.ScriptEngineException: TypeError: Cannot read properties of undefined (reading 'x')
at Object.serialize (Script [19]:31616:49)
at Object.getCrdtUpdates (Script [19]:33443:16)
at Generator.next ()
at Object.sendMessages (Script [19]:33186:18)
at Object.update (Script [19]:34167:22)
at async Object.onUpdate (Script [19]:52124:3)
at async __internalOnUpdate (Script [22]:13:21)
File "Generics__14.cpp", line 26828, in UpdateLoopAsync
File "il2cpp-codegen.h", line 792, in StartUpdateLoopAsync
File "mscorlib__10.cpp", line 6043, in StartUpdateLoopAsync
File "Generics__36.cpp", line 16086, in StartAndUpdateSceneAsync
...
(10 additional frame(s) were not displayed)

SceneRunner.Scene.ExceptionsHandling.SceneExecutionException: One or more errors occurred.
```
This issue was automatically created by Sentry via [Explorer Alpha Github Issue Creation](https://sentry.io/organizations/decentraland/monitors/alerts/3130340/)

Start with the linked Sentry issue and trace the update path through serialize, getCrdtUpdates, sendMessages, and onUpdate. Locate the corresponding Unity Explorer source and reproduce the undefined x failure. Done means the update loop no longer throws this exception for the failing case.

Written by the indexing model from the issue text.