Error "when uploading participant's results" in an online experiment

One of the participants in my online study reported the following error:

I see that the data is present at gitlab but the log file is missing. Any idea what might be going on? Other participants did not report any errors.

URL of experiment: main [PsychoPy]

Did that happen today? If so, it might be related to Error when loading dashboard tab on

yes, just about an hour ago

I’m having the same probelm (still now). Some participants (I don’t see any pattern) report this issue (approx. 10% of participants). Is there anything else I can check?