TypeError: 'NoneType' object is not subscriptable

[verymilan]

Hi there, i have a small issue i am not sure how to deal with.

Traceback (most recent call last):
  File "./bridge.py", line 162, in <module>
    exit(b.go())
  File "./bridge.py", line 65, in go
    self.launch_webservice()
  File "./bridge.py", line 122, in launch_webservice
    self.__appservice = self.loader.request_library("protocols", "matrix")
  File "matrix-xmpp-bridge/vendor/regius/lib/common_libs/loader.py", line 128, in request_library
    library = self.__load_library(full_libname)
  File "matrix-xmpp-bridge/vendor/regius/lib/common_libs/loader.py", line 377, in __load_library
    library = self.__load("library", full_libname)
  File "matrix-xmpp-bridge/vendor/regius/lib/common_libs/loader.py", line 339, in __load
    module.init_library()
  File "matrix-xmpp-bridge/lib/protocols/matrix.py", line 75, in init_library
    self.__matrix_cfg = self.config.get_temp_value("app_config")["matrix"]
TypeError: 'NoneType' object is not subscriptable