If you have an existing Money Dashboard account and get the error message 'Something went wrong' trying to login firstly please ensure you are on the correct login page. The Sign Up page https://my.moneydashboard.com/auth/register is for creating a new account, not logging in to an existing one.
Similarly if you are trying to enter your details on the website home page https://www.moneydashboard.com/ the email and password fields on this screen are also for creating a new Money Dashboard account, not logging in to an existing one. It is not possible to create a new Money Dashboard account with an email address that is already registered, so if you are trying to login to an existing account here this will explain why you are getting the error message.
You can log in to your account by clicking on the blue 'Log In' button on the top right of your screen, or by visiting https://my.moneydashboard.com/auth/login
If you are unable to remember your password you can reset it by clicking the 'Forgotten your details?' > 'Your password' buttons on the login page. More information on how to reset your password can be found here.
If you are on the correct login page and are confident your login details are correct, but you are still encountering a 'Something went wrong' message please contact support for further assistance.