Ok this will be a short one, but hopefully if someone else has this issue they will find it useful. I have no idea why this happened, but I am guessing it is related to updating Unity and Visual Studio.
If you’ve ever went to open Visual Studio and had your code look like this.
Sooo that would freak most people out I’d think. However, there is a simple solution. Go back into Unity and go to Edit > Preferences. Make sure to go to External Tools just double check you still have VS as the Script editor and then click the Regenerate Project Files button. This should fix your issue.