At first, thanks for having interest on this post. 

I have a Odoo V13 server, which was working fine. But suddenly while any user log inside it, he/she got a blank white page. The Screen Shot I added below. 

I have tried debug=assets after web but it's working only for one computer and rest of the user/computer can't get any page after clicking on log in. It doesn't matter which user I tried for but still same situation with this blank page.

Note: This is hosted by nginx.

I'll be really gratefull if someone helps me on that.