Tested without other plugins/mods

On forge, when running /locate Monument, the chat spits out a set of coordinates

On spigot/paperspigot, when running /locate Monument, the chat spits out an error

I believe this is because these Monuments/Mansions/etc are not marked as Structures correctly on the spigot side of things

This also breaks things in vanilla minecraft, such as the ability for guardians to respawn inside Monuments

I will do further testing and report in this thread

Please help :(

Hey, thanks for reporting this. I've tested this with OTG v5, spigot server and forge client, new Biome Bundle world. /locate Mansion works fine, could it be that you're using multiverse?

Am not using Multiverse, but I will run some checks. It might be because of the leftover old world files

Have had reports that /locate Stronghold causes problems, need to test.

Tested with v7, /locate Stronghold works. Likely also works for v6.