According to Blame, ****************** Blame Report 1.16.5-3.2.2-forge ******************

Failed to load structure nbt file from: minecraft:empty
The path represented by this is: data/minecraft/structures/empty.nbt
The calling Template Pool is: stoneholm:poi/bedroom_cross
Most common cause is that there is a typo in this path to the nbt file.
Please let the mod author know about this so they can double check to make sure the path is correct.
A common mistake is putting the structure nbt file in the asset folder when it needs to go in data/structures folder.

Is there a crash log or?

it didn't crash

Then this is just Blame not realising that minecraft:empty is a structure created from in Mojang code.

Closing as this isn't really a problem with Stoneholm.