I just checked and found that you have assigned a creative cloud team license to yourself and it is showing invitation pending.
Please check your email inbox and accept the invitation using your Adobe ID and then try to sign out and sign in to creative cloud desktop app .
You can also check the status if it is accepted or not by signing in to creative.adobe.com and click manage team.
Point to the license showing your user name and check if it is showing active or pending invitation.
you can refer to following link for managing team https://helpx.adobe.com/creative-cloud/help/manage-teams-membership.html
Also I can see that some users ID are associated with both subscriptions Old as well as new. Please unassign the old licenses for those users from old Creative cloud account to make sure they do not face the signin loop issue.
those users who have already accepted the invitation and still facing the signi in loop issue please try following steps for them depending on their operating system.
1) Close all adobe related processes in activity monitor (Creative cloud, Core sync, CC library, services for adobe desktop app, adobe desktop service, Adobe IPC broker, AAM updater)
2) Navigate to following locations and assign the current user full permissions to adobe folders. To navigate Please open finder and click go from menu bar at then click goto.. type /Library/application support/ and click go.
3) To assign the permission right click on adobe folder and click Get info.. A property window will open. Then click on lock symbol to enable editing. Then click + sign to add your username. Then change read only to read and write. Then click gear symbol at the bottom and click apply to enclosed items and click ok.. Proceed to next step then.
3) Navigate to following location /Library/application support/adobe and Rename Slstore to slstore.old and sl cache to slcache.old
4) Navigate to ~/Library/application support /adobe/oobe and delete opm.db
5)Navigate to /etc and open hosts file. Check if it has adobe entries . If no its fine, if yes replace the hosts file with a new hosts file with no adobe entries
6)Launch cc app and it should work fine
1) Close all adobe related processes in task manager (Core sync, services for adobe desktop app, adobe desktop service, Adobe IPC broker, AAM updater)
2) Navigate to following locations and assign the current user full permissions to adobe folders. (Right click on adobe folder select properties then click security tab , click edit and select current user you are signed in with , select full control , click apply and then ok)
C://program data (enable view hidden files to see this folder)
C://program files 86x/common files
3) rename SLstore to Slstore.old at following location c://program data/Adobe/
4) Rename SLcache to Slcache.old at following location C:\Program Files (x86)\Common Files\Adobe
4) Navigate to c://users/username/appdata/local/adobe/oobe and rename Opm.db to opm.old
5) Navigate to c://windows/system32/drivers/etc/ and open hosts file using notepad. IF you see any Adobe entry there please replace that hosts file with a new hosts file which does not have any adobe entry. If there is no Adobe entry leave the hosts file as it is.
6) Launch cc app and sign in .
Sorry im not effected I used my account for testing migration this is to be deleted the other users having the problem have activated account and signed in. the suggestion above didnt fix the problem