What does 'username and password error' mean in Oracle login account prompts?

admin

The previous Oracle Phoenix instance of the Oracle Phoenix was suddenly disconnected, and I wanted to log in to check behind the scenes. Open: https://cloud.oracle.com/compute/instances?region=us-phoenix-1 Enter the tenant, and it will take you to the login page. Enter the username and password, and it prompts that the username and password are incorrect. Click on the "Reset Password" button, reset the password, but still get the error message: Invalid username or password. Is the account G?