Package Manager hanging when importing package


everytime I wanted to import the new Inputsystem with the Packet Manager, the Manager is hanging with a 100% bar,

I don’t know how to fix it.
To use the project again I must delete the entry in the manifest.json

I tested it out with other Packages and Projects, and in other projects they’re import it all normal, but in my main project not…

Using Unity 2019.3.0b12 Personal, but it seems to be a problem in my project…

Hi, could you please update to the latest 2019.3 version and let me know if the issue still persists?