I have the administrator role for a project but I still can't assign users to an issue. I have checked and the administrator role has the permissions to assign users to an issue in the permission scheme, I have also checked the screen scheme and it already has the Assignee field configured. The view/edit issue screen has the assignee field. I have tried doing this from Jira rest API also and it didn't work. I tried from the main JIRA admin account and that didn't work too. I am able to add different fields to the screen scheme and I can see the changes being reflected but the problem seems to be only with the Assignee field.
Kindly , help me with this.