CSS and Javasrcipt not linking

Question:

When I load my page on the webview, everything is fine except all my javascript and css associated with my web page doesn’t load. It was working fine a few minutes ago, I only added a paragraph and everything broke once I refreshed. I’ve removed the paragraph and restored old versions but nothing seems to work.

Repl link/Link to where the bug appears:
https://replit.com/@almacarrozgribo/ProjetEspace
Screenshots, links, or other helpful context:

code snippet