Warning in console when selecting package.json

Whenever i select a package.json file from one of the package installed in the project, i get this warning in the console:

Is this a known issue? I am not sure it’s related to the beta though. I am using 2019.3b8 (latest one at the moment).

It’s a known issue: Unity Issue Tracker - 'Unable to find a MonoScript...' warning is thrown every time a package manifest file is selected