I keep getting the error "endpoint not found" with FastSM. I'm on mastodon.social, so I wouldn't expect much server instability. And if that were the problem, I'd expect a 500-level error. A 404 suggests that FastSM is using an API endpoint that doesn't exist anymore. So far, it's only mentions that can't be updated.
Oh good, the problem is random. My previous post never appeared in my home timeline. I tried to send a reply just now, got a 404, and tried again. It sent. My notifications timeline got a 404, even though a new notification appeared. This is going to be fun.
@alexhall Perhaps, it's time for you to migrate to another instance?