Are you logging with an AD user?
Is the NGCP account locked?
If not try logging with the NGCP user.
If NGCP account is locked, please follow the below KB article open a service request with Mcafee Technical Support team so that we reset the NGCP password for you.
https://kc.mcafee.com/corporate/index?page=content&id=KB74811&locale=en_SG&viewlocale=en_SG
Regards,
Prashanth B Pillai
Mcafee Technical Support
Customer Success Group