DOMException: Blocked a frame with origin

[ptorric]

Version

5.3.4

Browser and OS info

Chrome 90 on macOS 11.3.1 (20E241)

Steps to reproduce

using vue cli, npm run serve to watch you application on localhost:8080, inspect vuex and reload the app.

What is expected?

you can see a red error in console:

Uncaught (in promise) DOMException: Blocked a frame with origin "http://localhost:8080" from accessing a cross-origin frame.

What is actually happening?

vuex state is not consistend,
also event aren't captured anymore, the frame is empty

[rskinnerc]

Same issue here. I have to clarify that it only happens if the New Vuex Backend is enabled. Disabling this option fixes the problem.

[ovidiuc]

I'm getting the iframe error also in version 6.0.0 beta 14. There's no option to disable "New Vuex backend" in my case.