Do all network elements give the same error?
Or this could be your admin group was setup on each MCD prior to SDS sharing and there is a conflict, do a full sync and then look at the logs to see what forms failed to sync (you did a full sync after starting SDS sharing, right?) and do a form comparison to each element and see if you can manually correct the problem, but to be honest tuple view errors are usually fixed by either doing a full sync (if it fails, try from a different element) or by doing a database backup, then doing a restore, and then a sync from one of the other elements.