There are several reasons why your bank credentials may not have worked when attempting to connect your account. First, double-check that you have entered your password correctly and that you have selected the correct financial institution from the list. Keep in mind that recently changing your bank password can sometimes cause connection issues, so you may need to use your updated password when reconnecting. Occasionally, connection problems can also occur due to security measures, temporary bank server outages, or restrictions on certain types of accounts. For more detailed guidance and step-by-step troubleshooting tips, please refer to Plaid’s troubleshooting page here.