Versions

Forge Version: 14.23.4.2759
Minecraft Version: 1.12.2
Fun Ores Version: 1.6.2-123
Silent Lib Version: 3.0.5-152

Expected behavior

• Server start up continues as normal

Actual behaviour

• Server crashes during startup with a java.lang.NoClassDefFoundError

Steps to reproduce the problem

1. Run the server with above mod versions
2. Crash during loading

crash-2018-09-13_15.28.15-server.txt

The error looks like it's missing a dependency, but the only one is SilentLib which is definitely in there.

Silent Lib 3.0.5 fixes this issue (your crash report shows 3.0.4)

Oh, looks like my tester was on an old version. My bad