I am seeing a similar issue that is probably related:I could no longer edit any of my web properties in the DTM dashboard (which worked fine yesterday). The message in my case is "To access this company, please change your active organization. Contact a company administrator to be added the organization in the Marketing Cloud."I logged in through marketing.adobe.com and do have user and admin rights for DTM product assigned in the admin console.What worked for me to get rid of this error for now...