TypeError: cannot read property '$className' of null when running the command 'android hooking get current_activity'

Hello,

I'm encountering an error while trying to retrieve the current activity using the command 'android hooking get current_activity.'
The specific error message is as follows (I'm using the flag '--debug')
Also, the application is running properly.

A Frida agent exception has occurred.
TypeError: cannot read property '$className' of null
    at <anonymous> (src/android/hooking.ts:235)
    at <anonymous> (src/android/lib/libjava.ts:9)
    at <anonymous> (frida/node_modules/frida-java-bridge/lib/vm.js:12)
    at perform (frida/node_modules/frida-java-bridge/index.js:205)
    at <anonymous> (src/android/lib/libjava.ts:13)
    at Promise (native)
    at wrapJavaPerform (src/android/lib/libjava.ts:14)
    at <anonymous> (src/android/hooking.ts:243)
    at androidHookingGetCurrentActivity (src/rpc/android.ts:41)
    at apply (native)
    at <anonymous> (frida/runtime/message-dispatcher.js:13)
    at c (frida/runtime/message-dispatcher.js:23)

Python stack trace: Traceback (most recent call last):
  File "C:\Users\user\AppData\Local\Programs\Python\Python310\lib\site-packages\objection\console\repl.py", line 371, in start_repl
    self.run_command(document)
  File "C:\Users\user\AppData\Local\Programs\Python\Python310\lib\site-packages\objection\console\repl.py", line 185, in run_command
    exec_method(arguments)
  File "C:\Users\user\AppData\Local\Programs\Python\Python310\lib\site-packages\objection\commands\android\hooking.py", line 235, in get_current_activity
    activity = api.android_hooking_get_current_activity()
  File "C:\Users\user\AppData\Local\Programs\Python\Python310\lib\site-packages\frida\core.py", line 179, in method
    return script._rpc_request("call", js_name, args, **kwargs)
  File "C:\Users\user\AppData\Local\Programs\Python\Python310\lib\site-packages\frida\core.py", line 86, in wrapper
    return f(*args, **kwargs)
  File "C:\Users\user\AppData\Local\Programs\Python\Python310\lib\site-packages\frida\core.py", line 491, in _rpc_request
    raise result.error
frida.core.RPCException: TypeError: cannot read property '$className' of null
    at <anonymous> (src/android/hooking.ts:235)
    at <anonymous> (src/android/lib/libjava.ts:9)
    at <anonymous> (frida/node_modules/frida-java-bridge/lib/vm.js:12)
    at perform (frida/node_modules/frida-java-bridge/index.js:205)
    at <anonymous> (src/android/lib/libjava.ts:13)
    at Promise (native)
    at wrapJavaPerform (src/android/lib/libjava.ts:14)
    at <anonymous> (src/android/hooking.ts:243)
    at androidHookingGetCurrentActivity (src/rpc/android.ts:41)
    at apply (native)
    at <anonymous> (frida/runtime/message-dispatcher.js:13)
    at c (frida/runtime/message-dispatcher.js:23)

I would appreciate any assistance in resolving this issue.

Start with src/android/hooking.ts at line 235 and follow the android hooking get current_activity path through src/rpc/android.ts. Reproduce the command with --debug against a running application, then determine why the activity value is null and define the expected behavior when it is unavailable. Done means the command no longer raises the reported TypeError and communicates its result appropriately.