(google translation from Russian)
Hey!
As soon as I, playing on my server, reach the biome in which the Lost City is generated, the server crashes.
The crash log is attached.

crash-2021-04-09_20.20.18-server.txt
crash-2021-04-09_21.00.19-server.txt
crash-2021-04-09_21.04.02-server.txt

Thank you!

This crash is usually caused by wrong configuration of Lost Cities. What profile are you using and what did you modify?

general.cfg.txt
profile_chisel.cfg.txt
profile_default.cfg.txt

To be honest, I don’t remember what I changed. But few options.

Hard to see but most likely that will be the reason. If you (for example) change options so that building height can be too high or too low you can get crashes.

For example I:buildingMaxFloors=30
is pretty dangerous

Hmm ...
I love to experiment!
I'll put it on default.
Thank you!