Teamviewer on MacOS - logouts and sign in issues

I use TV personally for my iMac, win10 laptop and MacBook

On the iMac over the last 2 weeks I'm having nothing but issues (I have tried an uninstall and fresh install)

When I try to login - enter email and password - and click log in, nothing happens - so I cant see my other computers. One in every 10 (or so) attempts it will login and I can see my contacts, the rest of the time just nothing

I've checked my firewall settings (not that anything has changed) and TV has full access

Any suggestions appreciated. Thanks