Use the same email that received your club invitation or that you used when creating the account.
Check the address you entered and your spam or junk folder. The page shows a resend countdown; when it finishes, use the resend option. If you requested more than one code, use the latest email. Return to the email step if you need to correct the address.
Open the team selector in the sidebar and look for the expected team. Club membership and a claimed player profile provide different access. Ask the club owner to check your invitation and assigned teams if you need staff access.
If sign-in still fails, email [email protected] with your account email and club or team name. Include the error text and when it happened. Never include the verification code itself.