Hello,
Sorry for the late answer but it takes me some time to get the whole information.
We have our own bbb server. When we launch a bbb meeting via mattermost, it first redirects to blindsidenetworks before going to our own bbb server. So the administrator system uninstalls the plugin.
It seems to be a known issue of the plugin (https://github.com/blindsidenetworks/mattermost-plugin-bigbluebutton/issues/118).
Is there a way to connect bbb with mattermost without redirection?
Best,
Mathieu Lacroix