[SOLVED] Error "HTMLIFrameElement': Blocked a frame with origin"

When I'm on the CB home page (User Mandatory) I get the following js error in the inspector

Uncaught DOMException: Failed to read the 'contentDocument' property from 'HTMLIFrameElement': Blocked a frame with origin " insidepiano.com " from accessing a cross-origin frame.
at contents ( insidepiano.com/media/jui/js/jquery.min.js?3cf99efe489a4f2f1526e42acaef7ba3:2:26887 )
at Function.map ( insidepiano.com/media/jui/js/jquery.min.js?3cf99efe489a4f2f1526e42acaef7ba3:2:3613 )
at a.fn.init.n.fn.(anonymous function) [as contents] ( insidepiano.com/media/jui/js/jquery.min.js?3cf99efe489a4f2f1526e42acaef7ba3:2:27001 )
at insidepiano.com/insidepiano-community:369:33

These errors appear on by one, as if it is an active process, and they go up to the thousands.
It seems to be happening on the CB Home page and it's coming from the jquery.min site within the media folder.
Can you help me understand what this means?

I've attached a screenshot as well,

Thanks a bunch!

It's not coming from CB, but from Joomlas jQuery. Probably a 3rd party module or your Joomla template is my best guess. If is happening on your profile could be a Custom HTML field you've configured. The error doesn't make much sense the origin and domain are the same so the iframe shouldn't have any issues communicating unless the domain you're on is different from the domain in the iframe (e.g. http vs https or www vs non-www).

Thank you for input, your ideas actually helped me to isolate the issue.
It was coming from the membership Tab, from one of the CBsubs plans, in which I embedded a Vimeo video in the description, as soon as I deleted the video the problem went away. The issue might have been caused because my vimeo channel is set to private, although it is allowed to show videos on my domain on the setup, somehow embedding it in the description created that issue.

Thanks