Fix.

Patches/ModdedTraits_compatibility.xml

@@ -70,11 +70,9 @@
 	<!-- Brawler does not need vulnerability patching: they already get hefty bonus from melee-->
 	
 	<Operation Class="PatchOperationAdd">
-		<xpath>Defs/TraitDef[defName="Tough"]/degreeDatas/li</xpath>
+		<xpath>Defs/TraitDef[defName="Tough"]/degreeDatas/li/statOffsets</xpath>
 		<value>
-			<statOffsets>
-				<Vulnerability>-0.4</Vulnerability>
-			</statOffsets>
+			<Vulnerability>-0.4</Vulnerability>
 		</value>
 	</Operation>