Thank you Arnold for your reply ,
But the previous error is appearing when trying to view reports with admin , as when i try to view reports with a user from LDAP that synced in CMOD the error disappeared from ICN logs ,
But my problem now is that report is taking too much long time to open and show me in the viewer on ICN the below error
"Unable to display document : Failed to load document , Status: Unable to connect to the document repository"
before it shows the report then report is opened normally