Intermittent issue with pix not displaying

This file was provided by the curriculum creator and has worked flawlessly aside from 2 timeframes in the last 2 days. Any help would be appreciated.

The location screen is supposed to show a picture along with a description and 2 buttons. For some reason the last 2 days, the pictures are not showing but the rest of the app works. Any ideas?

All times central
10/17 between 120-207 pictures not showing- tested it less than an hour before pictures showed
10/18 between 1055am until posting this message - tested less than an hour before and pix worked

BostonTourGuide_complete.aia (187.7 KB)

Slight update. Same laptop, same program, different school different wireless network, different tablet, pictures showed up with no issues.