rasa_server_1 | File “/opt/venv/lib/python3.8/site-packages/rasa/core/channels/channel.py”, line 89, in register
rasa_server_1 | p = urljoin(route, channel.url_prefix())
rasa_server_1 | File “/opt/venv/lib/python3.8/site-packages/rasa/core/channels/channel.py”, line 108, in url_prefix
rasa_server_1 | return self.name()
rasa_server_1 | TypeError: name() takes 0 positional arguments but 1 was given
r