synapse.log

synapse.http.server - 110 - ERROR - GET-18132- Failed handle request via 'GroupRoomServlet': <XForwardedForRequest at 0x7fa836180910 method='GET' uri='/_matrix/client/r0/groups/%2Bdas-labor%3Adas-labor.org/rooms' clientproto='HTTP/1.0' site=8008>
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
StopIteration: []

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
StopIteration: []

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/synapse/util/caches/descriptors.py", line 438, in _wrapped
    cached_result_d = cache.get(cache_key, callback=invalidate_callback)
  File "/usr/local/lib/python3.7/site-packages/synapse/util/caches/descriptors.py", line 160, in get
    raise KeyError()
KeyError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/synapse/http/server.py", line 78, in wrapped_request_handler
    await h(self, request)
  File "/usr/local/lib/python3.7/site-packages/synapse/http/server.py", line 331, in _async_render
    callback_return = await callback_return
  File "/usr/local/lib/python3.7/site-packages/synapse/rest/client/v2_alpha/groups.py", line 329, in on_GET
    group_id, requester_user_id
AttributeError: 'NoneType' object has no attribute 'content'