multi user Picker custom field - unable to add user

[Madhur Bhatia]

I have a custom field called "CC list". 

One of my Jira users , is unable to add a project member to the CC list. Any idea  why ?   

[Ollie Guan]

Hi @Madhur Bhatia ,

Please confirm if this user has Browse users and groups permissions in global permissions.

https://confluence.atlassian.com/adminjiracloud/managing-global-permissions-776636359.html