In case of registering with same First and Last Names , Or by Providing Invalid Name Fields , the system/ BOT considers the names as Invalid in these cases and shows 'The Action Fails' error.
Upon providing valid names user should be allowed too submit application without Issues.
Note:
If applicants names are legit with Same First Name and Last Name and if the system restricts to submit the application please reach out to 'support.peoplevine.com'