Permission error
From MoodleDocs
You do not have permission to create this user account, for the following reason:
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Note: You are currently viewing documentation for Moodle 3.10. Up-to-date documentation for the latest stable version of Moodle may be available here: CreateAccount.
You do not have permission to create this user account, for the following reason:
The action you have requested is limited to users in the group: Administrators.