[11:37:40] [Worker-Main-13/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:mine_with_campsite/side_pool which is being called from mvs:other_decoration/mine_with_campsite
[11:37:40] [Worker-Main-3/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:farm/side_pool which is being called from mvs:other_decoration/wheat_grain_bin
list
[11:37:43] [Server thread/INFO] [minecraft/MinecraftServer]: There are 3 of a max of 65 players online: TagaSMe4, wiZZ, Malcik
[11:37:48] [Worker-Main-21/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:farm/side_pool which is being called from mvs:nature/long_oak_pathway
[11:37:48] [Worker-Main-21/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:farm/side_pool which is being called from mvs:nature/long_oak_pathway
[11:37:48] [Worker-Main-21/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:farm/side_pool which is being called from mvs:nature/long_oak_pathway
[11:37:48] [Worker-Main-21/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:farm/side_pool which is being called from mvs:nature/long_oak_pathway
[11:37:48] [Worker-Main-21/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:farm/side_pool which is being called from mvs:nature/long_oak_pathway
[11:37:50] [Server thread/WARN] [C2ME Async Serialization Manager/]: Block entities size mismatch! expected 2 but got 1
[11:37:50] [C2ME worker #6/WARN] [minecraft/ChunkSerializer]: Block Entity at BlockPos{x=-4039, y=-47, z=9542} for block Block{supplementaries:urn} doesn't exist
[11:37:54] [Worker-Main-34/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:farm/side_pool which is being called from mvs:other_decoration/wooden_wheat_farm
[11:37:56] [Worker-Main-35/WARN] [co.fi.mv.MVSCommon/]: Moog's Voyager Structures: Empty or nonexistent pool: mvs:farm/side_pool which is being called from mvs:other_decoration/wheat_grain_bin

This does not affect anything. Theyre from jigsaw blocks inside some of the structures which i will make use of in a future update. You can use the Log Be Gone mod to get rid of them if you choose.