Ubuntu 18.04.2 "Add to trusted devices" fails

Hi Teamviewer Team,

I am trying to use a new installed Ubuntu 18.04.2 (Teamviewer) on my Laptop because of new installation Linux after System problem and I have no success to "Add to trusted devices" on this Laptop only - used on same router and account on other Desktop PC with success..
Where is the potential problem?
- I use same account to login (used always on testing ot transfering data shortly);
- it is a some installation problem;
- or other reason...

Tagged: