Hi Helen_G,
Probably an old school vibes when you had to do things manually. As per further checking, MYOB don't have any current issues with missing employee self-onboarding. I suggest reinviting the employee one more time. You can check this link about employee self-onboarding for more details. If that doesn't work and the issue still persists, please reach out to our live chat team via our virtual assistant, MOCA, or submit a support ticket through MyAccount as this might needs further investigation.
Regards,
Shella