ValkyrienSkies: latest from Jenkins, valkyrien-skies-1.0.0+74f0d0fafe-all; also tried 1.1.4
SpongeForge: spongeforge-1.12.2-2838-7.3.0
Phosphor: phosphor-1.12.2-0.2.6+build50-universal
Nothing else installed on server, except for Nucleus, MagiBridge (sponge plugins) and CustomStuff4 (forge mod for new blocks). Don't think they can cause this issue.
ValkyrienSkies: latest from Jenkins, valkyrien-skies-1.0.0+74f0d0fafe-all; also tried 1.1.4 SpongeForge: spongeforge-1.12.2-2838-7.3.0 Phosphor: phosphor-1.12.2-0.2.6+build50-universal
Nothing else installed on server, except for Nucleus, MagiBridge (sponge plugins) and CustomStuff4 (forge mod for new blocks). Don't think they can cause this issue.
Log from console: https://mclo.gs/jrvebPL Generated crash report: https://pastebin.com/Mnw0J6aN
Perhaps there is some incompability here, but can't say for sure: