Hey @MilanBGD 

I can fully reproduce the problem. The mobile app also does not work to create the invitation link. Bug report is already created. Now waiting for feedback. Please be patient.

Update:
Some error messages have already been received by the support staff. The developers are informed so that the error can be fixed quickly.

Working now without problem.Thanks

Hi @MilanBGD, happy to hear that the situation has been resolved.
If you need any additional help, just let me know.