System.NullReferenceException: Object reference not set to an instance of an object.

Sentry Issue: [UNITY-EXPLORER-PFZ](https://decentraland.sentry.io/issues/7604303654/)

```
System.NullReferenceException: Object reference not set to an instance of an object.
File "DCL.AvatarRendering.cpp", line 31559, in GetRepresentation
File "DCL.AvatarRendering.cpp", line 30598, in GetHidingList
File "DCL.AvatarRendering.cpp", line 31089, in GetHidingList
File "il2cpp-codegen.h", line 633, in SetHideCategories
File "DCL.Social__24.cpp", line 23450, in SetHideCategories
...
(11 additional frame(s) were not displayed)
```
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 report and trace the reported GetRepresentation, GetHidingList, and SetHideCategories frames in DCL.AvatarRendering.cpp and DCL.Social__24.cpp. Identify which value is null in the Unity client and reproduce the reported path. Done means the path no longer raises System.NullReferenceException and the Sentry issue is no longer reproduced.

Written by the indexing model from the issue text.