Three test:
Are you banned from that community?
easy way to check: just try to access it while logged out. If you can, then you’ve been banned.
Did either instance block the other?
Nope.
How to check:
lemmy.sdf.org/instances
lemmy.zip/instances
Are you accessing Lemmy through a phone app instead of a browser, and is that app blocking that community or instance?
Easy way to check, just use a browser.
hirihit640@sh.itjust.works 8 hours ago
Probably because of this: lemmy.sdf.org/post/57319079