I try logging into one of my Instagram accounts, the other one works just fine without any problems. On the desktop page I get:
Confirm Your Info on the App
Confirm your information using the Instagram app to try to get back to your account.
and nothing else. Nothing about any weird activities or my account being suspended or anything, the account still exists: https://www.instagram.com/haku_blue_bayou/. When I try to log in on my app, I get "couldn't refresh feed", then "loading" and then the screen turns black and stays like this (it's white if I disable the dark theme).
I tried: restarting my phone, deleting app cache and storage, uninstalling and reinstalling theapp uninstalling and reinstalling an older version of theapp trying it out on different devices (Sony Xperia XZ2, Google Nexus7), resetting my password through email and facebook-account, changingapppermissions so Instagram has access to my camera and storage.