Remove that line from the JSON file.

Hope this helps other survivors test B42 without frustration.

★★★★★ (helpful for testing/mods)

Debug mode can cause unexpected behavior or crashes in Build 42 – it’s an unstable build. Backup your saves first. Works as of the latest B42 patch.

Some users report adding -Dzomboid.debug=true to a custom .bat file that launches the game, but the JSON method is cleaner.

Here’s a draft review for enabling debug mode in Project Zomboid Build 42. You can post this on Steam, Reddit, or a forum. How to enable debug mode in Project Zomboid Build 42 (tested & working)

If you need debug mode for Build 42 – whether to test mods, spawn items, or recover a bugged save – here’s the method that still works. The old -debug launch option is gone in B42, but there’s a new way.