What if there are a bunch of errors after updating unity?

So I decided to update but the latest version of unity and launched the same project which was normal and working

I see that a lot of sins on the trade plugin, I went into the package and there

In the previous version of unity, when I updated to the latest version, there were also errors, so I put verify 2.0.1 like or something like that, there are no other versions ...

And now I'm thinking about installing an old version of unity or rebuilding everything for a new one? Basically, the last project I did was already completed - essaywriterfree (this project), and I probably won't get into it. However, what if you were working on a project now and updating yourself that way? What do you advise?