Upgrade to Unity 2018.2.2f1 resulting in missing file errors from Visual Studio

Question

After being prompted by Unity to upgrade and doing so, Visual Studio is now giving me a long list of errors in the project about missing files.

Error   CS2001  Source file 'Packages\com.unity.textmeshpro\Scripts\Runtime\FastAction.cs' could not be found.  Unity.TextMeshPro   C:\Nightmare Games\Games\In Production\H0V3R\CSC    1   Active
Error   CS2001  Source file 'Packages\com.unity.textmeshpro\Scripts\Runtime\MaterialReferenceManager.cs' could not be found.    Unity.TextMeshPro   C:\Nightmare Games\Games\In Production\H0V3R\CSC    1   Active
Error   CS2001  Source file 'Packages\com.unity.textmeshpro\Scripts\Runtime\PackageResourceImporterWindow.cs' could not be found.   Unity.TextMeshPro   C:\Nightmare Games\Games\In Production\H0V3R\CSC    1   Active

There are 45 of these, and they're all in the project Unity.TextMeshPro. I've looked for these files and they don't see to be anywhere on my PC. Should I try reinstalling Unity or starting a new project again? Has anyone else run into this?

Answer 1

It turns out I did have all 45 files, but they were nowhere near the project folder VS was trying to find them in. They were in

C:\Users\(me)\AppData\Local\Unity\cache\packages\packages.unity.com\[email protected]\Scripts\Runtime.

I copied them over and everything seems fine now. I expect Unity to handle this kind of stuff on its own when I run the installer.