I’m currently facing an issue with a newly created that fails to load inside the Shopify iframe due to a blocked script execution error related to sandboxing ( refer Screenshot ),
This same application works perfectly in a production version deployed earlier. Only this newly created staging version is affected.
I also found a community post describing the exact same issue, but it currently has no solution:
Hi,
We do have the same problem with our app. If I click on the link in the console error message then our app loads its main page but when I try to load the app from admin then it stops loading like your page. We haven’t found a solution to this yet, hopefully Shopify checks this.