How do I package a stand-alone app with Matlab Compiler without getting errors?

I have created a program that involves reading and writing information to an Excel spreadsheet. I have created a stand-alone app using Matlab Compiler, but the program will not write or open the Excel spreadsheet. I am using writetable and xlsread.

I am trying to compile an application with SelectFile.m as the main and SelectFile.fig, Alternative.m, Primary.m, Alternative.xlsx, and Primary.xlsx as required files. Before packaging the app, I have all of these files in the same folder named "Austin's Research Project". After packaging, installing, and running the app, an error message pops up (3.png). Any help with this issue?