I cannot add link after login to dashboard

[Fallar]

I have this on attempt to add link. Any suggestions?

[Fallar]

OK im one step futher - now i have

Initialization failed. Error: Domain name zibi-android-timetoriff.action.link is already taken. Try reinstalling with a different postfix.

Error.

But, i used compeletely UNIQUE postfix, never used here. I've tried 10-15 times, every time with UNIQUE postfix, and always have this error.

[Fallar]

Please, could somebody help me with this?