Hi,
We encountered below error when a user with Administrator project role try to remove users assign to another project role (e.g. Owner).
Error msg: "You can not remove a user/group that will result in completely removing yourself from this role."
Both project roles (Owner and Administrator) were granted with “Administer Projects” permission.
When the admin account is added as one of the Owners then he can remove existing owners except for himself.
Would appreciate if anyone can share your experience if you encounter similar issue.