Importing package from GitHub directly doesn't allow opening the Demo Scene

[MiguelOliveiraF]

If we try to add the package via the GitHub link, it will install as a private package, preventing us from opening the demo scenes.

Functionality itself seems to work fine though

[mrwellmann]

Could reproduce it tracking ticket internally via MP-2969.

[mrwellmann]

Until we fix this pleas download the package from https://github.com/MindPort-GmbH/VR-Builder/releases and import it via Assets->Import Package.

Note: If you have imported the git package you need to remove it first before adding the unity package via Import Package.