You are not invited to this room error

[antoyo]

Hi.
I tried to setup mautrix-facebook bridge and while it seems to partly work, I have an issue where it continuously fetch the same message over and over to backfill the history.
It shows the following traceback in the console:

Traceback (most recent call last):
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/appservice/api/intent.py", line 592, in ensure_joined
    await self.join_room(room_id, max_retries=0)
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/appservice/api/intent.py", line 128, in wrapper
    return await __method(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/client/store_updater.py", line 62, in join_room
    room_id = await super().join_room(
              ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/client/api/rooms.py", line 335, in join_room
    content = await self.api.request(
              ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/api.py", line 395, in request
    resp_data, resp = await self._send(
                      ^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/api.py", line 250, in _send
    raise make_request_error(
mautrix.errors.request.MForbidden: You are not invited to this room.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/appservice/api/intent.py", line 592, in ensure_joined
    await self.join_room(room_id, max_retries=0)
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/appservice/api/intent.py", line 128, in wrapper
    return await __method(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/client/store_updater.py", line 62, in join_room
    room_id = await super().join_room(
              ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/client/api/rooms.py", line 335, in join_room
    content = await self.api.request(
              ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/api.py", line 395, in request
    resp_data, resp = await self._send(
                      ^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/api.py", line 250, in _send
    raise make_request_error(
mautrix.errors.request.MForbidden: You are not invited to this room.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix_facebook/user.py", line 593, in run_with_sync_lock
    await func()
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix_facebook/user.py", line 665, in _sync_recent_threads
    await self._sync_threads_with_delay(
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix_facebook/user.py", line 730, in _sync_threads_with_delay
    had_new_messages = await self._sync_thread(thread)
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix_facebook/user.py", line 847, in _sync_thread
    ) = await portal.backfill_message_page(
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix_facebook/portal.py", line 1079, in backfill_message_page
    event_ids = [
                ^
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix_facebook/portal.py", line 1080, in <listcomp>
    await intent.send_message_event(
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/appservice/api/intent.py", line 141, in wrapper
    await __self.ensure_joined(room_id)
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/appservice/api/intent.py", line 598, in ensure_joined
    await bot.invite_user(room_id, self.mxid)
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/appservice/api/intent.py", line 141, in wrapper
    await __self.ensure_joined(room_id)
  File "/home/user/Ordinateur/matrix/mautrix-facebook/lib/python3.11/site-packages/mautrix/appservice/api/intent.py", line 596, in ensure_joined
    raise IntentError(f"Failed to join room {room_id} as {self.mxid}") from e
mautrix.errors.base.IntentError: Failed to join room !TFbOAkiWhrbUcTshqT:localhost:7077 as @facebookbot:localhost:7077

Thanks to fix this issue.

[fnordsh]

I'm having the same issue - any news on this?
Since it's so quiet here, I suspect not everyone has this problem - is there a workaround, or a configuration option I should change to fix the problem?

EDIT: I found a workaround: enable encryption in the room. (set allow: true and default: true)
This causes the bot to be automatically invited and the error does not occur anymore.