Signup page: "Please check your information and try again"
My partner is trying to sign up for a new personal account. He enters his information perfectly fine on the signup page but keeps getting the error message "Please check your information and try again" which doesn't highlight any wrong information. He hasn't left any field blank but is still getting an error message and the page absolutely will not let him create an account.
What is the cause of this issue and how can it be fixed? Why is it giving error messages for a form that looks perfectly filled in? Why is it not saying what the issue actually is, just that there is one? An answer would be greatly appreciated as he would like to sell some crafts soon.