A. 1. Double-check that you are entering the correct username and password. Ensure that Caps Lock is off and that there are no extra spaces. 2. If you have forgotten your password, use the 'Forgot Password' feature to reset it. Follow the instructions sent to your registered email.

B. 3. If you are using a password manager, ensure that it is filling in the correct credentials. Sometimes, password managers can autofill outdated or incorrect information.