Sorry, something went wrong ...in Edge Chromium

At a new company, they acquired another company in the past year and have "moved" the acquireds SharePoint. I can access from Google Chrome, thats the default browser here...but Chromium Edge gives me:

Links dont go anywhere...Developer Console shows errors starting with this one:

Refused to apply style from 'https://XXXXX.sharepoint.com/_layouts/15/1033/styles/error.css?rev=4HI0CuxoRga57tIZSh2UBA%3D%3DTAG861' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.