VS Code isn't recognizing html files

VS had suddenly stopped recognizing HTML files and it doesn't autocomplete tags or even show the syntax unless I manually input every single file name in it, I would really appreciate the help on any idea how to solve that Here is how it looks:

I have tried many things but nothing seems to work or help fix it

See if this solves the problem: On the bottom right of the application, you should see something like this:

Click on the "Plain text".

Search HTML in the list and click it.

Then your HTML should turn colorful.