I am stuck on the registration step with the error message "Enter a valid last name" Danny S. October 26, 2022 16:08 Updated Please remove any blank spaces left at the end of the last word in this field, and also note that special characters are not allowed. If you still can't get past this step, please contact customer service. Related articles Is a business license required to sign up? How do I register an account? How do I confirm my account? Is registration free? Can I use multiple payment methods to pay for an order? Comments 0 comments Please sign in to leave a comment.