Error!

[Smalling]

Hello! Running the server on the mohist-1.16.5-895 kernel, I encountered an error:17:29:23 ERROR]: Exception stopping the server
[17:29:23 ERROR]: Exception caught during firing event: No server set.
        Index: 3
        Listeners:
                0: NORMAL
                1: net.minecraftforge.eventbus.EventBus$$Lambda$2881/0x0000000800d59c40@203206cc
                2: net.minecraftforge.eventbus.EventBus$$Lambda$2881/0x0000000800d59c40@69ce79a1
                3: net.minecraftforge.eventbus.EventBus$$Lambda$2881/0x0000000800d59c40@d503985
java.lang.IllegalStateException: No server set.
        at appeng.core.worlddata.WorldData.instance(WorldData.java:92)
        at appeng.core.AppEng.serverStopped(AppEng.java:218)
        at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:247)
        at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:239)
        at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302)
        at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283)
        at net.minecraftforge.fml.server.ServerLifecycleHooks.handleServerStopped(ServerLifecycleHooks.java:125)
        at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:868)
        at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:269)
        at java.base/java.lang.Thread.run(Thread.java:834)

[17:29:23 ERROR]: java.lang.IllegalStateException: No server set.
What to do in such a situation?

[Smalling]

And yet, why does this error occur?

[Smalling]

Okay