I am bang uptodate, updated this morning on 2 RPies running bullseye.
Pi-hole version is v5.17 (Latest: v5.17)
AdminLTE version is v5.20.1 (Latest: v5.20.1)
FTL version is v5.23 (Latest: v5.23)
I thought I had been having a long running problem updating 2 adlists getting connection refused
So as a first step i changed unbound and restarted with 'do-ip6 no' and updated gravity.
Watching whilst I updated gravity I saw both adlists successfully accessed.
Whether access is succesful or not I always get the adlists are inaccessible messages in pi-hole diagnosis along with unavailable for the health status on the adlist tab.
[i] Target: https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts
[✓] Status: Retrieval successful
[i] Target: https://www.github.developerdan.com/hosts/lists/ads-and-tracking-extended.txt
[✓] Status: No changes detected