No problem at all. Glad we could come to a solution together.

Created a new project and the same thing happened. Have uploaded the projekt to the link you supplied.

I tried importing again and this turned up:

Thanks for input. I replaced the installed version with Unity 6 LTS. Now these alarms are shown when i want to press play.

I have not gotten the "realvirtual" menu choice either.

Tried importing again and now have these errors. Cant press play due to compiler errors.

Works now.

I closed and opened the project, opened package manage and went to my assets. There i found realvirtual, clicked import and now the popup window with package content appeared. Which i imported.