@Syed-Hasan I would support all that @fossette says in the previous post.
You should pay particular attention to 2 issues:
Make sure that the system is fully operative by using a delay as suggested by @fossette
As is mentioned in the referenced post, make sure the program you want to run at boot terminates in a timely manner and doesn't end up blocking the start up process - e.g. run it in the background
Looks like your connection to Community was lost, please wait while we try to reconnect.