Issue accessing parts in hassio

I have for some time had a big issue in my hass.io setup.
I run 0.84.3 at the moment and my issue is that i cant activate/use lovelace or my panel-iframes.

If clicking “Try out the new Lovelace UI (experimental)” i only get this:

The error message points to this file: https://pastebin.com/4NgPgT50

I get the same issue when trying to access my panel-iframe links to but pointing out another file:

The configurator is accessible if i use the address set in my config directly in chrome https://xxxxxxx.duckdns.org:3218

I have deleted my old ui-lovelace.yaml file and the add-on i used to create it from recommendations on the discord server, and have clearad the cache several times.

What have i done wrong/what is f*cked up in my hass?

//Crall