I have an Ubuntu 18.04.5 LTS that ran bc successfully until a few months ago. The system is fully updated. I had compiled and installed v3-beta but the client would would not stream from it. I then parked it for a while.
I recently returned to it and I purged bc completely, including the mysql user, and pull from stable for a clean install of stable from your archive.
I then ran into this:
Aug 30 12:02:37 ubuntu2 bc-server: E(): Binding to /tmp/bluecherry_status failed
Aug 30 12:02:37 ubuntu2 bc-server: E(): Failed to bind to socket /tmp/bluecherry_status
Aug 30 12:02:37 ubuntu2 bc-server: E(): Failed to setup the status server
I note that there was no error for bluecherry_trigger, which the code also attempts to bind and the code comment suggests it is a duplicate, sort of, of the server_status call. However as far as I can see that is called after status_serve->reconfigure so it probably never got to it.
I don’t have SELinux running, but do have AppArmor. I only mention this because I have read that SEL can block bind attempts if not setup rorrectly.
The install was run as sudo and otherwise vanilla.
I have not yet purged and tried with unstable but will as soon as I am able.