I've been getting these error messages in my Unity project.
I'm unsure how they came about, and I don't know how to fix it. Can someone explain why those meta files are missing? I like to be able to fix it so it doesn't cause any issues later on.
Currently using Unity 2018.2.12f1. But I was getting the errors before I updated to my current version.
Here is a partial solution showing some research I found. It might help.
Go to console, right click on the package.
Then select open in explorer.
I found that this package was not in the expected Users[username]\Documents file structure. Also the dates were old so it seems my reimports had had no effects. So in windows explorer I deleted the complete package.
Then I reopened the project in Unity, and at package, reimport all.
This fixed it.
in my MacOS case, i quit unity, deleted everything in <Path To My Project>/Library/PackageCache, and relaunched.
