Follow these steps to prevent this crash from occurring if you are experiencing it:

  1. Right-click on Indivisible.exe in your SteamApps install folder (generally found in SteamLibrary\steamapps\common\Indivisible)
  2. Select "Properties" at the bottom of the list
  3. Click on the Compatibility tab at the top of the popup window
  4. Check the box for "Disable fullscreen optimizations"
  5. Click Apply, OK, and then relaunch Indivisible from Steam