I am very new to Unity so I am hoping this is easily solved and the right place to post.
I am getting 79 errors in my console every single time I open any project, I attached an image of a few of them.
I was told by someone to download the Package Manager UI package from the Package Manager, however, this does not seem to exist in my Window tab. Also, in Project → Packages, the folder in there named Package Manager UI is empty and I have been told it should not be empty.
As a complete beginner to Unity this is beyond me and I have no idea what to do.
Your console is only reporting 7 errors, but you have it set to not show errors (the red ! with 7 next to it has been clicked to no longer show them). The 79 are warnings.
Enable the display of the 7 errors and deal with them first.
I see. Thank you for explaining that. These are the errors. I have no idea what they mean and they seemed to have appeared from nowhere, I was using Unity for a good 12 hours before these started appearing.
