Every time I open a project, there are a lot of errors. Most of them are ".meta file ..... does not have a valid GUID....", error CS0234, and CS0246. This is the first time Unity installed on this PC, so I think there is something wrong with the installation. I tried to reinstall it, but it still has an error. Any solution?
![alt text][1]
[1]: /storage/temp/202036-untitled.png
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