MC fails to launch (1.10.2) Exit code -1

[BeansBeefBroccoli]

System Information

MultiMC version: 0.6.11-1430

Operating System: Windows 10

Summary of the issue or suggestion:

MC does not launch and the log says: "Exiting with -1
Process exited with code -1."

What should happen:

MC should launch.

Steps to reproduce the issue (Add more if needed):

1. Create New Instance

2. Install Forge

3. Add Mods

4. Press Launch

Suspected cause:

Maybe my Java?

Logs/Screenshots:

https://pastebin.com/gp7TnbZe

Additional Info:

I don't know much about technical stuff.

[sylv256]

Simple Answer

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This looks like a launcher bug. Exit code -1 usually means an error occurred.

Long Answer

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It appears that launchwrapper failed to load due to an invalid cast (AppClassLoader -> URLClassLoader).

[sylv256]

It could be your version of Java. I recommend using Java 8 instead of Java 11 since it runs better and has a lower chance of weird errors like this one.

[Janrupf]

It is indeed Java 11 causing the issue

[peterix]

Yep. Use Java 8.

[BeansBeefBroccoli]

thank you