I found that some people had the same problems as I did, so I think rimefeller's patches probably failed.

XML error: Could not find parent node named "81mmMortarShellBaseCraftableBase" for node "ThingDef". Full node: <ThingDef ParentName="81mmMortarShellBaseCraftableBase" Class="CombatExtended.AmmoDef"><defName>Shell_Napalm</defName><label>Napalm shell</label><description>A shell filled with flammable gel and a small explosive charge. Starts fires when detonated. Can be fired from mortars. Explodes when damaged.</description><graphicData><texPath>Things/Item/Resource/Shell/Shell_Incendiary</texPath><graphicClass>Graphic_StackCount</graphicClass></graphicData><comps><li Class="CompProperties_Explosive"><explosiveRadius>3.3</explosiveRadius><explosiveDamageType>Flame</explosiveDamageType><explosiveExpandPerStackcount>0</explosiveExpandPerStackcount><startWickHitPointsPercent>0.7</startWickHitPointsPercent><preExplosionSpawnThingDef>Filth_NapalmTrail</preExplosionSpawnThingDef><preExplosionSpawnChance>0.25</preExplosionSpawnChance><postExplosionSpawnThingDef>Filth_Fuel</postExplosionSpawnThingDef><postExplosionSpawnChance>1.0</postExplosionSpawnChance><wickTicks><min>10</min><max>30</max></wickTicks></li></comps><costList><Steel>15</Steel><Napalm>15</Napalm></costList><statBases><Mass>4.3</Mass><Bulk>6.5</Bulk></statBases><ammoClass>Napalm</ammoClass></ThingDef>
Verse.Log:Error(String, Boolean)
Verse.XmlInheritance:GetBestParentFor(XmlInheritanceNode, String)
Verse.XmlInheritance:ResolveParentsAndChildNodesLinks()
Verse.XmlInheritance:Resolve()
Verse.LoadedModManager:ParseAndProcessXML(XmlDocument, Dictionary`2)
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.<>c:<Start>b__6_1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.<>c:<UpdateCurrentAsynchronousEvent>b__27_0()
System.Threading.ThreadHelper:ThreadStart_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object)
System.Threading.ThreadHelper:ThreadStart()