Since last week we are having the same problem.
I’m not sure if this is about exceeding the user limit because everything works fine on almost any machine but just a handful of them running Edge.
Chrome works fine and, as Marco said, running incognito on those same machines works.
Matthieu,
I have the same. This is what I learned. The error will not occur when logging in using the Incognito window. It will not go away when hitting refresh. The error will disappear when trying to debug using the Chrome Developer tool.
Go make it.