Active Directory Integration Error Message

Hi TechyV buddies!
I am having an error in adding an Active Directory Group in our domain. Our domain was added to the SetupSystem AdministrationSystem & website page. The error message is this:
“The validation of the data provided failed due to the following: Active directory group 'WinNT:/prtgadmins' not found The object has not been changed.”
Can anyone help me with this problem? I will provide any information if needed. I will be thankful for any help rendered. Thank you!
