There is an issue somewhere around (World: kingdom X: 2443 Y: 12 Z: -425) with the minecart system. I tried to reset some of the area to the most recent backup but it did not help. So either the issue is older than that or there is a fundamental issue with the minecart plugin. Unfortunately it’s very late for me (1:15 am) so I do not have the energy to now unpack an older backup and test (it’s gigabytes large and takes a while) so I resorted to disable the plugin for now.
We will see if we can either revert the area or fix the plugin to not crash the server over the weekend. Please stand by until then.