"Send notification to group technician(s)..." option in support groups doesn' save

"Send notification to group technician(s)..." option in support groups doesn' save

"Send notification to group technician(s)..." option in support groups  doesn' save. I set all 3 checkboxes in suppoort group. Fill string "Notify to" (choose technicians from list). Then press save button. System says me " SUCCESS :Group details updated successfully"  . But in fact nothing saved. If i enter the defined group again - there is empty checkboxes. And notice not send also. And in notification rules if i choose checkboxes on group notification there's also no send emails with notification.

Help. I have MSP Standard edition 8.3.0 
              New to ADManager Plus?

                New to ADSelfService Plus?