URL of experiment: https://run.pavlovia.org/jenkim9/cyberbinding/html/ Description of the problem: When running my Builder experiment online, I see only a blank screen. Using F12, the console window gives 5 error messages, all saying “Loading module from … [location] … was blocked because of a dis…

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Two more suggestions: Export to the most recent version of PsychoPy (2021.1.2) Leave “output path” empty in Experiment Settings → Online

We had the same issue with “disallowed MIME type” and setting the ‘Use PsychoPy version’ to 2021.1.2 (as suggested by Thomas) solved it. Thank you!

Hello, sorry for this graveyard shift but I’m having the same problem with running my experiment. Is using version 2021.1.2 still the only way to fix this?

Hello everyone. I have a similar issue related to this topic. I’m receiving an error when reading JSON files, which says, “Refused to execute script from ‘’ because its MIME type (‘application/json’) is not executable, and strict MIME type checking is enabled.” I’ve attached a screenshot of my error…

"Loading module was blocked because of a disallowed MIME type (“text/html”)"

Online experiments

thomas_pronk March 25, 2021, 2:30pm 3

Two more suggestions:

Export to the most recent version of PsychoPy (2021.1.2)
Leave “output path” empty in Experiment Settings → Online

"Initializing" Screen due to a "MIME" error

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"Loading module was blocked because of a disallowed MIME type (“text/html”)"

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