WoW front-end treats API network errors as empty responses

[toolness]

Sydney just ran her development environment but her server immediately crashed because her .env file was out of date... However, this caused the front-end to behave in an odd way: when accessing property pages, instead of saying there was a network error, WoW showed her the "no registration for that BBL" page, implying that the problem was with HPD's data or the tenant's landlord, rather than the network!

Instead, the front-end code should show some kind of page indicating that a network error occurred.