It seems to work in safe mode with only themes disabled so I think it’s a theme component or custom code acting up
https://ifutures.discourse.group/?safe_mode=no_themes
If you check your /logs you should see some extra info that should help identify which one.
There should also be some errors in your browser console when you look at the site out of safe mode as well that could tell you more (I’m on my phone at the moment so can’t look myself, though someone else might jump in with the extra info 
)