Firstly, the smartphone must be connected to the same WLAN as the alarm control unit. This is the case if you are able to find the alarm control unit when you “search for devices”.
Furthermore, you must have entered the username and password correctly at login. There is no “incorrect password” error message, you will simply see the red exclamation mark in the top corner of the app, which signals that the connection was not successful. It is sometimes helpful to delete a connection from the list in the app and re-establish it using the “+” symbol. Otherwise, check your user information in the GPA, enter your password again and transfer the project to the alarm control unit.