I successfully installed Cells v3 with Collabora plugin working.
After the latest update, the configuration of the plugin is tricky: I have to restart cells to read new configurations.
But the main problem is: the connection to the websocket of Collabora host ignores port settings (and defaults to 443).
This worked until the latest update, released on 2022-10-17 (Cells 4.0.1).
Is it a bug or I’m doing something wrong?