What wrong with the app

hello community !
Many Times I am facing a problem, after installing the app the app open button was disabled and also the app disappeared from the home screen.
I know the solution for this by this method.

Download Your AIA file and rename the file from .aia to .zip Extract the zip file Search the Screen1.scm file and open in any text editor.clear the authURL section

But I want to know the possible reason of this error ? Because it will help me to avoid these mistakes every time.
And is there any other method to fix that ?

Thank You For Replying