My friend built an elevator on our server and when he tried it the server console was flooded by errors. i managed to copy the error spam and uploaded it here. This flooding caused the whole server to freeze and finally everyone got kicked out.

This might be same as #96.

Thut's Elevators version: 6.0.14
ThutCore version: 5.16.1
Forge version: 14.23.1.2586
SpongeForge version: 2555-7.1.0-BETA-2890
Minecraft version: 1.12.2

looks like it is the same as #96, I will test some fixes, and hopefully have an update out shortly

6.0.15 is uploaded, it should fix this issue, re-make the issue if it doesn't.