City Center design challenge, iPad crashing.

I had no issues with this challenge hours earlier. Within the last 2 hours, the app has been crashing whenever I attempt to open Education, Landmarks, Entertainment, and several other categories within the challenge. Since both Landmarks and Entertainment are required for the bonus goals, the challenge becomes impossible.

I closed and reopened the app several times, and also resorted to rebooting the iPad with no luck. Crossing my fingers for tomorrow so I can finish and have something to submit more than the basics.