To create an account on our site our backend requires a certain password quality level to be accepted. As you type in your password, an indicator will display the quality of the password. A password considered to be very weak or weak will not be accepted. In most cases to fix this, make sure you have numbers, capital letters, special characters and it's 7+ letters long. The quality of the password is generated by how quickly the password can be guessed or hacked, so it helps to avoid common words and names. If you meet the listed requirements but it still lists "very weak" or "weak", its probably because you are using a common term within the password.
To test your password and to see why it might be considered weak, see this link: https://www.my1login.com/resources/password-strength-test/ for more details or to test other passwords.