yes indeed it is butchering spot, here is one of the logs, tell me if you want them all (you could also look at them yourselfs from your game I quess):

Attempt to use string Description to refer to field description in type Verse.ThingDef; xml tags are now case-sensitive. XML: <ThingDef Abstract="True"><category>Building</category><thingClass>Building</thingClass><soundImpactDefault>BulletImpactMetal</soundImpactDefault><selectable>true</selectable><drawerType>MapMeshAndRealTime</drawerType><terrainAffordanceNeeded>Light</terrainAffordanceNeeded><repairEffect>Repair</repairEffect><leaveResourcesWhenKilled>true</leaveResourcesWhenKilled><filthLeaving>BuildingRubble</filthLeaving><defName>ButcheringSpot</defName><label>Butchering Spot</label><Description>A makeshift spot for butchering dead creatures into pieces of raw meat.</Description><ThingClass>Building_WorkTable</ThingClass><graphicData><texPath>Things/Building/Production/CraftingSpot</texPath><graphicClass>Graphic_Single</graphicClass><drawSize>(1,1)</drawSize></graphicData><AltitudeLayer>FloorEmplacement</AltitudeLayer><statBases><WorkToBuild>0</WorkToBuild></statBases><scatterableOnMapGen>false</scatterableOnMapGen><useHitPoints>False</useHitPoints><Size>(1,1)</Size><DesignationCategory>Production</DesignationCategory><Passability>Standable</Passability><hasInteractionCell>True</hasInteractionCell><interactionCellOffset>(0,0,-1)</interactionCellOffset><surfaceType>Item</surfaceType><inspectorTabs><li>ITab_Bills</li></inspectorTabs><building><spawnedConceptLearnOpportunity>BillsTab</spawnedConceptLearnOpportunity><sowTag>SupportPlantsOnly</sowTag><canPlaceOverImpassablePlant>false</canPlaceOverImpassablePlant></building><recipes><li>ButcherCorpseFleshSpot</li></recipes><comps><li Class="CompProperties_AffectedByFacilities"><linkableFacilities><li>ToolCabinet</li></linkableFacilities></li></comps><designationHotkey>Misc1</designationHotkey><placeWorkers><li>PlaceWorker_ShowFacilitiesConnections</li></placeWorkers></ThingDef>
Verse.Log:Error(String)
Verse.DirectXmlToObject:GetFieldInfoForType(Type, String, XmlNode)
Verse.DirectXmlToObject:ObjectFromXml(XmlNode, Boolean)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MethodBase:Invoke(Object, Object[])
Verse.<AllDefsFromAsset>c__Iterator2:MoveNext()
Verse.ModContentPack:LoadDefs(IEnumerable`1)
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__1()

Hmm... Looks like I was wrong assuming it was compatible with B18 :c
I'll be working on an update which fixes the error, though I'm not quite sure what's causing it

Okay, I think there's a few mysteries to solve:
https://puu.sh/yqm6W/7173b39a8e.jpg

1. "Attempt to use string Description to refer to field description in type Verse.ThingDef; xml tags are now case-sensitive."
2. "BulletImpactMetal", which is in this mod, found in Defs > ThingDefs_Buildings > Buildings_Base.xml, Line 7.

What is "xml tags" referring to? And why does "BulletImpactMetal" appear in every log?
If anyone can help find the problem, it'd be much appreciated!! ;w;

The mod seems to function properly despite the debug log errors

I am getting this debug error message too, but other than that the mod works flawlessly.

Yea, I get this "case-sensitive" error from other mods too, but they all seem to work normaly.

The fix:
https://gist.github.com/luisbrandao/9afb3f943c1abe785a2e7f0787de8afa
https://gist.github.com/luisbrandao/1cf638756b6a6058ec530b13cabf86bd
https://gist.github.com/luisbrandao/eee1836fddd705650cac1cec61a0cbcd
https://gist.github.com/luisbrandao/c7ef54bd7d7ca23f96f8725907d3cd05