Gnome-calendar SSL/TLS Certificate Trust Issue

I’m having an issue with Gnome Calendar and Google calendars. Every time I start my computer or wake it from sleep/suspend I am greeted by a series of windows from gnome-calendar titles ‘Certificate trust…’ (one for each sync’ed google calendar) telling me ‘Unacceptable TLS certificate’ because ‘The signing certificate authority is not known.’ (see image below).

There seems to be no problem with the certificate details, so I click ‘Accept Permanently’ on all windows, only to have them reappear on my next login.

Can’t find anything about this online… any ideas?


Screenshot from 2020-02-04 10-22-55|690x293

This is quite possibly a distribution specific thing. What are you running?

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