Android games crashing on startup on android. How to fix

I am trying to get my project on android and have built it and loaded it onto the system. as soon as i start the app it crashes. I have tried the mobile temple demo and that has worked. How can I fix my game so that it will run on android? Is it a checkbox that i am missing somewhere or is it a larger problem that maybe one of you have encountered and can help me fix? Any help would be greatly apprecieted.

Hello Sohile,

Thank you for your report. We were not able to investigate this on the engine version you reported, but there have been many version changes to UE4 since this question was first posted. With a new version of the Engine comes new fixes and it is possible that this issue has changed or may no longer occur. Due to timetable of when this issue was first posted, we are marking this post as resolved for tracking purposes. If you are still experiencing the issue you reported in the current engine version, then please respond to this message with additional information and we will investigate as soon as possible. If you are experiencing a similar, but different issue at this time, could you please submit a new report for it.

Thank you.