I appreciate your continued patience. Today I applied a few additional fixes, including to nginx, which were contributing to the error 500’s. The good news is that the only errors I see in the kbin app logs are related to inbound post federation from lemmy-based instances. I am sure there are many more issues to, but I’m knocking them down one at a time.
At the time of this post, selecting all with Federation enabled on the web via Firefox Android, 500 errors all the time. Tried it at least 8 times. Also the same on Firefox iOS and safari, so not browser related.
Does not appear to throw the 500 on Windows With Firefox or with Edge.
Further Testing. If I disable "Show magazines’ icons:" then the 500's go away in ALL. Threads still throwing 500's like in the Two Links above I posted.