Learn Javascript Course - Mini Browser Not Working

While doing the Learn Javascript course the preview browser stopped working at some point, can’t really interact with it, and it doesn’t show any of the changes I make in the code, I’m using Brave, tried to switch to Safari and initially it worked, but after some progress and passing onto the next lessons it stopped working too. The only thing it lets me do is to refresh, and nothing happens.

“Blocked script execution in ‘https://scrimba.com/__sw__blank.html’ because the document’s frame is sandboxed and the ‘allow-scripts’ permission is not set.”

Tried looking around for a fix but It didn’t work, even disabled the “protection” brave offers to try and see if it was blocking JavaScript or something but no luck.

Any fix for this? Thank you!

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Hey @x1nnas, looks like the support team has picked this up and helping you troubleshoot this. It’s a weird one so not entirely sure what’s causing it. The support team is looping me in to assess it with them so will help you out there.

If we find a solution I’ll update this post for others to see.

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Hi José, I had a very similar issue while doing a Scrimba course. I’m using Google Chrome, and the preview browser stopped working too. In my case, the problem was caused by a Chrome extension called “Allow CORS: Access-Control-Allow-Origin”. I disabled it, cleared the browser cache, and everything started working again. Maybe you have a similar extension interfering. Hope this helps!

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