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Unfortunately we encountered an unspecified error (error code: 10

URL of experiment:

Description of the problem:

I set this experiment to Piloting, click Pilot, and get the message: “Unfortunately we encountered an unspecified error (error code: 10.”

The browser’s development console has these additional details:

FATAL unknown | {"origin":"PsychoJS.start","context":"when starting the experiment","error":{"origin":"ServerManager.openSession","context":"when opening a session for experiment: MADlab/incentivized-flanker-w-perceptual-load-2","error":{"origin":"","context":"when opening a session on the server","pathWithNamespace":"MADlab/incentivized-flanker-w-perceptual-load-2","user":null,"pilotToken":"a87ff679a2f3e71d9181a67b7542122c","error":"unknown experiment","errorCode":10,"httpStatusCode":404}}}

This experiment runs fine in local debug mode.

Possibly related:

When I click “View code” on the experiment’s Pavlovia page, it takes me to the correct GitLab project ( However, there are some discrepancies:

  • On Pavlovia, the experiment is listed as “Incentivized Flanker w. Perceptual Load”, while on GitLab it’s called " Incentivized Flanker w. Perceptual Load II"
  • No description is listed on Pavlovia, while GitLab says “IVA2”
  • No Software Platform is listed on Pavlovia (should be PSYCHOJS) and the Platform Version is 0 (should be 2020.2).

It seems that Pavlovia is not syncing information from GitLab for this experiment. Not sure if that is related to this issue.