Problem with Upgrade from 6.0.6 to mor recent version

I have inherited a pydio installation which has pydio 6.0.6 installed. When I found (and pressed) the upgrade button, I got the following error message:

file_get_contents(): Peer certificate CN=*' did not match expected

Any suggestions?

hi, update server is no longer available, please change to

Yes, but what do I need to change on this existing install to change servers?

Please change in Pydio >> Settings >> Feature plugins >> Action plugin >> updater

Thank you. That appears to have done the trick.