[Geary] Unable to store server trust exception

[edwardp null net]

One of my email services, changed its hosting company and the domain in the new secure certificate now does not match the server name.

Geary displays what it is in the subject line, along with "Couldn't find a place to store the pinned certificate." when either Always Trust This Server or Trust This Server is selected.

Is there a way to somehow store the certificate? If I select either of the above two options, I can retrieve any email, but this window otherwise appears at the beginning of each Geary session.

I have removed the account, closed then relaunched Geary, then added the account, with the same results.

Thank you in advance.