For anybody having issues with Catbox links that has comcast/xfinity as their provider follow this link https://blog.catbox.moe/post/673326917205803008/comcast-xfinity-blocking for info on how to fix, I was able to load that part of catbox website but not files. It explains whats going on and links to https://www.xfinity.com/support/articles/using-xfinity-xfi-advanced-security

Basically comcast has a security feature that by default is on and by being on censors catbox media content. If you disable this you should be able to view Catbox links again