Instant crash upon clicking play on launcher.

Started by millbridgeroblox on

Topic category: Troubleshooting, bugs, and solutions

Joined Sep 2025
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Instant crash upon clicking play on launcher.

Hello. I am trying to use my mod, and it worked well in test runs that MCreator allows you to do, but when I exported my mod and put it in Minecraft, I get an instant "Game Crashed" error with exit code 1.

 

The mod is on Neoforge for 1.21.1 with GeckoLib.