Doesn't work

[Xinned]

prefab is empty

[CodeSmile-0000011110110111]

Which Unity version are you using? 2019.3 is required.
Try importing the package in a new project with Unity 2019.3.13 to see if the prefab is still empty in that case.

[Xinned]

i am installing now 2019.3.15, will check if it works now

Thank you, wonderful feedback and very fast!