# Experiment designer undefined

**URL:** <https://discourse.psychopy.org/t/experiment-designer-undefined/13151>\
**Category:** Online experiments\
**Created:** [May 8, 2020, 7:17am UTC](https://discourse.psychopy.org/t/experiment-designer-undefined/13151 "2020-05-08T07:17:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sandrate](https://avatars.discourse-cdn.com/v4/letter/s/45deac/32.png) [@sandrate](https://discourse.psychopy.org/u/sandrate)\
**Post date:** [May 8, 2020, 7:17am UTC](https://discourse.psychopy.org/t/experiment-designer-undefined/13151/1 "2020-05-08T07:17:10Z")

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URL of experiment: [Sign in · GitLab](https://gitlab.pavlovia.org/Mi_Lab/at-encoding-cba)

Description of the problem:  
Hi! I have an experiment on Pavlovia that has a Piloting status right now. Whenever I try to pilot however this error pops up:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/d/3/d3053057b6d184f0e61c2fea44f9c242ac9bcb9d.png)

The experiment runs perfectly offline on Pyschopy. If anyone has any ideas as to what this may be, I would really appreciate the help.

Thanks!