Error While integrating OPManager with ServiceDesk Plus

Error While integrating OPManager with ServiceDesk Plus

Hi,
when I want to integrate OPmanager with SDP error message shown as below:

"Failed to update ServiceDeskPlus settings.. null"
How can I fix this issue?

my SDP version: 11303
ma opmanager version:  12.5.3
              New to ADManager Plus?

                New to ADSelfService Plus?