WP Dashboard is showing as just Text, no user interface shown

Good Afternoon,

I’m having a very odd issue with one of our sites, square-banana.com, where the WordPress dashboard is just showing as plain text as follows:

https://snipboard.io/buygmG.jpg

This is happening on all dashboard pages, most of which I know can’t get to and even if I did, there’s nothing I can do on the page itself.

This seems to be on Chrome only as Firefox/Safari seem to be ok. It’s also doing this in Incognito mode as well and no matter how much I clear the cache, both lcoal and server, it makes no difference.

Things that we’ve done to try to alleviate this:
– Purged Website Cache
– Cleared Local Browser Cache
– Disabled Plugins
– Change Themes to Twenty Twenty One
– Removed custom CSS and Javascript
– Tested a version on the site on a staging platform (so staging.square-banana.com)
– Reinstalled WordPress
– Spoken to our host support about this, they could not replicate the issue

This is a very odd error that we’ve actually spend 5 months dealing with, previously we’d be able to get along with it with Incognito mode but now it’s showing the error there too, so we can’t get into the site with Chrome.

The page I need help with: [log in to see the link]