Can't login in OS X app

Lately (for a couple of weeks) I can't login within OS-X Teamview app, while I successfully login on the web.

I checked status of Teamviewer and it shows that all is fine. However login within the app says that: 

Sign In request failed! The server did not respond.
Please try again.

I checked the logs and see messages like this:

2017/12/21 01:22:00.695 7115 123145422708736 G501   AccountLogin::Start: Trying account authentication
2017/12/21 01:22:00.702 7111 123145366241280 S0     CSendCommandToMaster::SendBCommandToMaster: CC=3 CT=4
2017/12/21 01:22:30.776 7115 123145422708736 G501!! AccountLogin::OnTimeout: no master response
2017/12/21 01:22:32.637 7115 123145422708736 G501   AccountStorageConnector: Invalidated
2017/12/21 01:22:32.651 7115 140736758551488 G501   Account::SetLoginState: new state: 2
2017/12/21 01:22:52.334 7115 140736758551488 G501   Account::SetLoginState: new state: 3