Error out block

20.10 21:16:00 [Server] Server thread/ERROR This crash report has been saved to: /./crash-reports/crash-2018-10-20_21.16.00-server.txt
20.10 21:16:00 [Server] Server thread/WARN [FML]: Can't revert to frozen GameData state without freezing first.
20.10 21:16:01 [Server] Server thread/INFO [FML]: Applying holder lookups
20.10 21:16:01 [Server] Server thread/INFO [FML]: Holder lookups applied
20.10 21:16:01 [Server] Server thread/WARN [EnderIO]: Failed to write Transciever Channels on exit: java.util.concurrent.ExecutionException: java.lang.NullPointerException
20.10 21:16:01 [Server] Server thread/ERROR [extracells]: Skipping event FMLServerStoppedEvent and marking errored mod extracells since required dependency appliedenergistics2 has errored
20.10 21:16:01 [Server] Server thread/ERROR [FTBT]: Skipping event FMLServerStoppedEvent and marking errored mod FTBT since required dependency FTBL has errored
20.10 21:16:01 [Server] Server thread/ERROR [FTBU]: Skipping event FMLServerStoppedEvent and marking errored mod FTBU since required dependency FTBL has errored
20.10 21:16:01 [Server] Server thread/INFO [mcjty.lib.varia.Logging]: RFTools: server is stopping. Shutting down gracefully
20.10 21:16:01 [Server] Server thread/ERROR [thaumicenergistics]: Skipping event FMLServerStoppedEvent and marking errored mod thaumicenergistics since required dependency appliedenergistics2 has errored