Hello, I submitted the bug report that led to this bug. I understand that development on a fix may take some time, but I wanted to request a documentation update as a stop-gap measure until the fix is deployed.

I spent hours trying to solve this problem because, to me, it looked like the package manager was not opening. I followed the guidance found in the documentation (https://docs.unity3d.com/Manual/upm-errors.html#Missing) and had zero success. The documentation recommends going through the project.manifest and manifest.json files, downloading .NET SDK and Visual Studio Toolsets, and resetting the package configuration.

Please - the first step in troubleshooting a package manager that won't open should be resetting the layout. If this bug is the reason why the package manager "won't open" (because it's open and not viewable), then none of the other troubleshooting steps will do anything.

Resetting the layout takes a few seconds and does not alter any files or require anything to be backed up. If it doesn't fix the problem then someone could continue on with the rest of the troubleshooting steps.

Thanks for verifying the bug,

Chuck