Error message when uploading an experiment


Description of the problem:
I cannot upload an experiment to Pavlovia. I tried to open PsychoPy several times, created a new folder, logged out and logged in to Pavlovia. I get the following error message:
Traceback (most recent call last):
File “C:.….…\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\app\pavlovia_ui\”, line 162, in submit
File “C:.….…\AppData\Local\Programs\PsychoPy\lib\site-packages\psychopy\projects\”, line 636, in refresh
raise ValueError(f"Could not find project with id {} on Pavlovia: {requestVal}")
ValueError: Could not find project with id 345526 on Pavlovia: {‘origin’: ‘’, ‘context’: …

Can anybody help me with this problem?

I am getting the same error message. See below At one point, I think I saw that there was some maintenance being done to Pavlovia today and that the ability to add new users might be impacted. Is the same true for new experiments? I have tested this with 3 different .psyexp files etc. and get the same error.

Traceback (most recent call last):
File “/Applications/”, line 162, in submit
File “/Applications/”, line 657, in refresh
ValueError: Could not find project with id 345537 on Pavlovia: {‘origin’: ‘’,…

I have the same problem, it’s probably because of maintenance.

Here is relevant text from the server maintenance information (full link below). It seems likely this is the issue.

Similarly, some of you may notice that a newly created experiment is not appearing on their dashboard on : it will also have appeared by Friday, at which point it will be possible to pilot it.

Good afternoon,

This is indeed a temporary, regrettably unintended, side-effect of today’s maintenance.
Your experiment has been created on our GitLab server but it is not available just yet on the pavlovia server, which is confusing the PsychoPy Builder.
I am on it and hope to have this sorted in a few hours, and certainly by tomorrow (Friday).
With my apologies for the glitch!


Good afternoon,
Thanks for answering. I apologize in advance for the spam of my projects as I tried several times to create a new one.