If you want to enable other users to create protocols, their role has to be Admin or Normal user. This has to be settled at the team level, so go to Settings and open the Teams tab. Select the team and detailed information will appear. You can see all the team members and their information.
As an Administrator you have complete authority in terms of managing the team and the projects. When clicking the Edit button, you can assign or reassign roles to your team members, as well as remove the members from the team.