URL of experiment: Online_ToM [PsychoPy]
The experiment is in PILOTING mode
Description of the problem: I got the following error :
- SecurityError: Failed to read the ‘cssRules’ property from ‘CSSStyleSheet’: Cannot access rules
See also screenshot

But if I press OK, the experiment is running correctly. Any idea how to get rid of this message?
Thank you for your help.
In some browsers, if a stylesheet is loaded from a different domain, accessing cssRules
results in SecurityError
.
CSSStyleSheet - Web APIs | MDN
Are you loading a style sheet that isn’t in your experiment folder?
Hi @wakecarter,
Thank you for your quick reply.
I think I see where is the problem.
I duplicated the files from the HTML folder to the main folder of the experiment.
I guess it created some mismatch with the pathway of the file
I will regenerate the file and see if it can solve my problem.
Thank you
I almost never make direct edits to files on Gitlab – I let the sync from PsychoPy Builder do the file management.
Yes, I did that usually but for some unknown reasons, the PsychoPy builder was not updating the files outside of the HTML folder.
When I tried to generate the JS it was only updated in the HTML folder but not in the main folder of the experiment. So when I tried to SYNC with Gitlab it didn’t SYNC the last version of the JS.
I am a newbie with PsychoPy and the SYNC was working perfectly fine until today. So I don’t know what happens exactly.
Maybe it’s because I didn’t update the experiment in the Builder but tried to generate only a new JS file?
Unless you are using a version prior to 2020.2.5 then you shouldn’t be outputting to an html folder. Look at Experiment Settings / Online. There’s no html in your run link so you probably shouldn’t have one.
I click save and then sync in Builder (generating html on sync).
1 Like
Ok, I was probably misguided by comments posted about previous versions. I deleted the HTML folder, and the experiment is running smoothly online without an error message.
Thank you for your help!

1 Like