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...