After clicking the invitation code link, an error message saying 'The invitation code has been locked' appears?

Reasons for this prompt:
If a user clicks on the invitation code link too many times within 24 hours or keeps refreshing the page while the link is loading, the system may prompt that 'the invitation code has been locked'.

Solutions:
You can send a different invitation code to the customer or suggest that they click on the invitation code link the next day.