Exported app not working macOS

Hello and thank you community, I have a problem with my exported app. It does not open. I’ve tried the control open and double click. They both flash the icon, yet nothing happens.
my code is using the following libraries

import processing.pdf.;
import java.util.Calendar;
import processing.video.
//import processing.sound.*;
I have tried with the sound parts disabled as I have a 20min wav file that plays but to no avail.

my data is in the java folder in package contents
I have 2 .txt files and a .wav file

code runs fine in processing 3.5.3
my mac os 10.12.6
have not tested on windows as I have no PC

what code would be helpful for anyone to help solve this puzzle?

thank you, my first post here.