I'm working on an issue with Silent Gear, where resources from the data folder sometimes fail to load. I have not been able to reproduce the issue myself, but several users have reported the issue only occurs when KleeSlabs is installed. I may know why this is happening.

I noticed you are using ISelectiveResourceReloadListener. For whatever reason, this accesses a client-only class, ReloadRequirements. I recommend using IResourceManagerReloadListener instead. It is marked as deprecated, but I have had no issues with it.

Links

• Related Forge issue: MinecraftForge/MinecraftForge#5837
• Possibly related issue on my repo, although I haven't gotten any additional information: SilentChaos512/Silent-Gear#30
• Log file from my test server, the error I mentioned is on line 10419. I don't believe there's anything useful in the log since this was a successful startup, but it's here if you want it:
  https://gist.github.com/SilentChaos512/0c092ac382ddaded0d00f02f20e992e2