"IDE is having problems" Reload doesn't fix.
That happens every now an again, I think it's due to scaling issues with replit that they are working on fixing. A few things you can try are:
Refresh and clear cache like you did
Try a different browser
Restart your browser
Logout of replit and log back in.
and if none of that works, then there isn't really anything else to do other than just wait for fifteen minutes or so and try again.