Unable to remove user from group

Unable to remove user from group

Hi, I have a user group in Password Manager Pro from there I would like to remove single account, but when I try to do so options is greyed out and tooltip appears 'User is required to approve the access control of the resources.'.

1) How do I find where/which resource to change so that user can be removed.
2) I tried to analyze all resources with Access Control, found not a single one with particular user.
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                New to ADSelfService Plus?