I'm running Odoo on ubuntu using nginx as a reverse proxy to serve different databases on various subdomains. (sub of my primary)
Backups have never triggered an error before but now I get this:

Odoo Client Error
Uncaught SecurityError: Failed to read the 'contentDocument' property from 'HTMLIFrameElement': Blocked a frame with origin "https://mysubdomain.mydomain.com" from accessing a cross-origin frame.
-----------------------------------------------------------------------------------------------------------https://mysubdomain.mydomain.com/web/static/src/js/core.js:447
 

And it still performs the backup. Additionally when I try to restore the backup I get restored success followed by restore failed, but the restore seems to be intact? I have no idea what this is and need some help to identify the problem.