Thanks Marion.
That did indeed do the trick.
I had not logged into the "Substance" site with my Adobe account and I had logged in with this account as far as Im aware.
But as Im managing our Adobe licenses also, I was logged into the
https://adminconsole.adobe.com with my Adobe credentials (and technically also the adobe.com main site it seems)
Nice to know that those two setups are not compatible. Not ideal, but I assume its because you guys are transitioning over to "their" account frameworks.
I think in your sticky post here on the forum, you should probably also tell people to try and log out of any adobe sites.
Thanks for the help, much appreciated.