The last few builds do not work with Office 365 Admin Portal. All the other O365 online apps work fine but as soon as you click Admin this is the error that is displayed. Switch to Chrome and it works fine. Have tried in in-private Edge and tried clearing cache, same behavior.
@Elliot Kirk This is also starting to show up in other browsers. No rhyme or reason - all of a sudden it just stops working, the only fix appears to be a reboot to get all browsers to work again otherwise our admins have to be sure they ahve multiple browsers for O365 administration.