my son said to me that the server crashes every time an ender crystal is placed at the portal.
Is a logfile with verbose logging needed?
we have the following installation:
standalone server on Debian buster with minetest version 0.5.3
mineclone 0.70 from git pulled on 3 Feb. 2021
the clients are 5.3 on Windows 10 and Linux (openSuse Leap 15.2)
and these mods