"Blocked a frame with origin from accessing a cross-origin frame" when connecting via Nginx proxy

Installation Home Assistant OS
1

I’m trying to connect to Hass (v 0.71.0) through a Nginx proxy. Everything works fine until I click on the “Hass.io” menu to get to the add-ons. After that I get a flashing message “Service system_log/write called.” in the bottom left and in the logs I get a continuous stream of

2018-06-09 13:35:19 ERROR (MainThread) [frontend.js.latest.201806080b0] https://[url]/frontend_latest/5f865e9ebd4764019c14.chunk.js:14:449 Uncaught SecurityError: Blocked a frame with origin “https://[url]” from accessing a cross-origin frame.

After clicking that link you are unable to access anything else via the web ui until you refresh/reload the page.

This happens in incognito mode as well too.

Everything works fine when accessing the interface directly.

2

I’m also trying to access the same version, but on the local network - this error is coming up in the logs repeatedly. It doesn’t seem to be preventing access, just wondering what’s wrong…

I’ve restarted the system, and the error has stopped - for the moment