Thanks for the suggestion, @wakecarter. Unfortunately I don’t seem to be able to change the version. When I set the version to another one in Experiment Settings (in this case 2022.2.5) and then push it to Pavlovia, the platform version on the experiment’s pavlovia page does not change (even after switching to inactive, and back to piloting) but the experiment will no longer run (“initialising the experiment” message). The error is this issue with MIME-Typs (“text/html”) that is described here "Loading module was blocked because of a disallowed MIME type (“text/html”)" Back then I had to go back to an even earlier version of psychopy to get it to work. Is the only way to get a stable version of psychopy to go back to a 2021 version?!
Edit: I just tried going back version-by-version and i can get it to sync and show a version change up to 2023.2.1 but from 2023.2.0 I get stuck on “initialising” and the MIME-Type issue described above. Any ideas why that might be?