Similar, perhaps related (?): Group membership access settings disabled
I have an instance, of which I am an admin. We have run into an issue where we are unable to manage the first ‘Access’ setting of the group (“Allow users to join the group freely (Requires publicly visible group)”), as the checkbox is disabled:
The group visibility and member list is is set to ‘Everyone’:
I have checked another group on the instance and the ‘Allow users to join’ checkbox works as expected. I also tested with a newly-created group and the checkbox works as expected there too – disabled when not visible to everyone, enabled when visible to everyone.
What could cause this? How can I debug it? I have access to the server running the discourse instance but would be happier tracking it down on a dev instance, which I can create locally from a backup if necessary.