Any module that uses localhost:8000 not working

Hey guys and gals

On my work PC (I have permission to work on CC), the only thing that doesn’t work is any module that uses the “localhost:8000” tab. The IT guy has whitelisted a list of websites I found on another topic, but none of that worked. I’ve tried this is Firefox, Edge, and Chrome. Is there something else that needs to be done in order for this to work?

I should have also mentioned, we use SonicWall and ESET for security. The website list above was whitelisted on SonicWall