Hello Thomas,
Please sign-out and login again with your mendix account and try to access marketplace again
Hi Thomas,
I’ve experienced the same issue in a higher version of Mendix. What worked for me was closing and reopening the Marketplace tab. To do this, right-click on the tab — you should see options like Float and Close Tab. Click on Close Tab, then try accessing the Marketplace again. That resolved the issue for me. Give it a try and see if it helps!