Standalone App element fails to open because of internet access

I've created and compiled a standalone app for doing some basic image analysis, and deployed it to a couple of computers. One of the computers it is to be used on sits on a network that requires a proxy for connecting to the internet. This app does not use any functions that should connect to the internet. However, some functionality is being blocked, with MATLAB giving me an error, saying that it cannot connect to the internet. The functionality in question is the uitable() function.

I have tried to use our organization's proxy settings in the MATLAB preferences dialog, but this continually fails (macOS). Are there any other workarounds to ensure full functionality of my standalone app on machines with no internet access?

Cheers