Drone Fails to Take Photos

After setting all parameters and overlaps for the picture taking and flying the drone with the app, the drone takes off and flies the flight path successfully but fails to capture the pictures during the process. What am i not doing right.

You might try this.
Recycle power on the drone and controller.
Reformat or change your SD card.
I would suggest uninstalling and reinstalling the app and also turning the mobile device off and back on to clear out possible conflicts.

With both the drone an RC off, hold the power button of each (not necessarily at the same time) for 10-15 seconds for reset. Also, make sure you DJI Go firmware is up-to-date.