This error is seen when any changes are made on the Domain controller. Once the change is made, the PID ( on the Domain controller) changes and the same is not updated automatically on CPPM.
This issue is seen on versions prior to CPPM 6.2.
We can follow the below steps to fix this.
Navigate to "Administration » Server Manager » Server Configuration" on CPPM and restart the Domain service.
If the above steps does not help, we will have to force CPPM to leave the domain and rejoin it.