Teamviewer 13 - Can't login to our account on several PCs

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The option to login to our accounts is grayed out on several PCs since today. 
I tried reinstalling TeamViewer on one of them but still can' log in. 

I saw on the Twitter feed that there were some service issues yesterday that should be fixed according to the status page: 

https://status.teamviewer.com/

Any idea what could be causing our issue?