Blizzard Arcade Collection Offline Gameplay?

I have had the Blizzard Arcade Collection installed on both my PC and my laptop for quite some time now and enjoy the titles it offers, specifically The Lost Vikings and The Lost Vikings 2.

The issue I am experiencing is with playing the game when offline.

The thing is, I live in South Africa where the local power provider periodically shuts down power for 2-4 hours at a time up to three times per day to preserve generation capacity (“Loadshedding”). When this happens, I can obviously not play on my PC because of the loss of power. It is for this reason that I also installed Blizzard Arcade Collection on my laptop.

When the power is out, I start the Battle.Net Launcher and Continue Offline (because my Wi-Fi is also down at the time). But when I attempt to play Blizzard Arcade Collection, it appears to want to start, but then immediately exits and returns to the launcher - meaning it cannot be played offline.

The Blizzard Arcade Collection works fine when online.

My question is this: How can I play Blizzard Arcade Collection offline?