Duplicate Question. If the first post didn't help you, this one won't either.
https://answers.unity.com/questions/1681666/unity-is-saying-my-keystore-password-is-wrong.html
I cannot use my keystore in Unity
Hello, I am having problems creating and using keystores in Unity. Whenever I create a keystore and try to assign it in the Publishing Settings in the Player Settings in the Project Settings by putting in the password for the keystore and clicking on the alias dropdown, the console displays an error: Unable to create key in keystore. Please make sure the location and password of the keystore is correct.
I have made sure the password is correct. Even when I allow Unity to automatically input the password, it still says it's wrong. It also says, however, that the path can also be wrong, but Unity also automatically inputs that, so please help me I have been trying for days and this is driving me insane.