Media Library Error

Hello,
After setup demo content automatically, somehow media library got broken. It only shows loading circle when i try to go in.

I tried to change logo before installing demo content. It was working.
I tried to change logo after installing demo content again. It’s not working. I’m unable to change logo.

So I tried to understand why it’s happening, I realize that Media Library doesn’t working so it maybe causing this error.

I activated another theme, and Media Library was working well with it.

So I think there’s some bug in somewhere.

I don’t see any private message option here that i can send my site details to you.

Looking for your help.
Thanks