# Uploading builder experiment on pavlovia

**URL:** <https://discourse.psychopy.org/t/uploading-builder-experiment-on-pavlovia/22050>\
**Category:** Builder\
**Created:** [April 5, 2021, 6:18pm UTC](https://discourse.psychopy.org/t/uploading-builder-experiment-on-pavlovia/22050 "2021-04-05T18:18:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![vhadjipanayi](https://avatars.discourse-cdn.com/v4/letter/v/c37758/32.png) [@vhadjipanayi](https://discourse.psychopy.org/u/vhadjipanayi)\
**Post date:** [April 5, 2021, 6:18pm UTC](https://discourse.psychopy.org/t/uploading-builder-experiment-on-pavlovia/22050/1 "2021-04-05T18:18:59Z")

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Hello,

I have finished building my visual search task experiment on the builder interface and I am now trying to upload it on pavlovia to run online. Now that I pressed the sync button I got this error:

File “/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/psychopy/experiment/components/code/ **init**.py”, line 231, in writeRoutineStartCodeJS  
TypeError: **str** returned non-string (type NoneType)

and I do not know how to proceed or what exactly this errors means.

Thank you

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**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [April 5, 2021, 8:05pm UTC](https://discourse.psychopy.org/t/uploading-builder-experiment-on-pavlovia/22050/2 "2021-04-05T20:05:10Z")

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What version are you using?

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**Author:** ![vhadjipanayi](https://avatars.discourse-cdn.com/v4/letter/v/c37758/32.png) [@vhadjipanayi](https://discourse.psychopy.org/u/vhadjipanayi)\
**Post date:** [April 6, 2021, 5:48am UTC](https://discourse.psychopy.org/t/uploading-builder-experiment-on-pavlovia/22050/3 "2021-04-06T05:48:26Z")

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I think I was using a previous version os Psychopy3. So i downloaded that now and I tried to upload my psyexp file on the builder of Psychopy3. But it is not running now and I get this error:

File “/Users/veronika/.psychopy3/versions/psychopy/visual/basevisual.py”, line 16, in   
from statistics import mean  
ModuleNotFoundError: No module named ‘statistics’

##### Experiment ended.

Shouldn’t the psyexp file run normally on psychopy3 version as well?

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**Author:** ![aisa2](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/aisa2/32/8666_2.png) [@aisa2](https://discourse.psychopy.org/u/aisa2)\
**Post date:** [April 12, 2021, 8:10pm UTC](https://discourse.psychopy.org/t/uploading-builder-experiment-on-pavlovia/22050/4 "2021-04-12T20:10:49Z")

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see this thread: [Errors Pushing to Pavlovia PsychoPy 2021.1.0](https://discourse.psychopy.org/t/errors-pushing-to-pavlovia-psychopy-2021-1-0/20762)