Source-code Shining Through Websites

Hai,

I don't know if this the right place to post but here I go:
I got some weird issue with a lot of websites I open. First of all the source-code of the website will 'shine' through the pages. And secondly, the websites won't work properly. For instance if I open Netflix it will show all the tiles of the movies but when I want to play a movie it shows me only the source-code. I downloaded Tweaking Repairs but after a lot of repairing I still have the same issue. The problem is on all the browsers I use (IE, Chrome, Brave). I included a picture of a random website with the source-code shining through. Does anybody know how to deal with this?

https://drive.google.com/file/d/1mVNHvJ6_2L14PmulwomI932K6d-7F_Yk/view?usp=sharing