QUESTIONUsers are unable to grant login access to Nintex Support. Why is this the case?
ANSWERFrom Setup, enter Login Access Policies in the Quick Find box, then select Login Access Policies. For users to Grant Login access, the Available to Users bubble must be filled in for Nintex Support
Here is Salesforce documentation associated with this issue. Please see the Note section under step number 3. https://help.salesforce.com/articleView?id=controlling_login_access.htm&type=5