Update not working: "Curl error: SSL certificate problem: certificate has expired"

[sh903]

Steps to reproduce

1. Login as Admin and start GUI update from version 12.0.3 to version 13.0.4
2. When downloading .zip file, the update process stops
   

Pointing any browser to the download URL (see picture) revealed that the download server certificate seemed to have expired the night before...

Expected behaviour

Update process should not stop.

Actual behaviour

Download of .zip file and hence finishing
the update is not possible

[nextcloud-bot]

GitMate.io thinks possibly related issues are #2958 (Update error), #3806 (cURL error 77), #9193 (W2G2 update problem), #4766 (Update Button not working), and #6640 (Sabre\HTTP\ClientException: SSL certificate problem: unable to get local issuer certificate).

[sh903]

Thanks for fixing the download server certificate so quickly!!! I was able to finish the update 30 minutes after sending this report.