The role is too low!
Nate Bot cannot perform certain actions (give roles, kick, ban etc.) when the role is too low in the hierarchy.
A simple solution is to move the role to a high enough position.
To fix this, go to your Discord server settings then click on Roles. Then, click on Nate Bot's role and drag it all the way to a suitable position above other non server modifying perm roles.
If Nate Bot is still showing you the error message, please join our Support Serveropen in new window and we'll be happy to help!