As far as i can tell same issue with Windows 10.

[Better Mechanoid Loot (continued) - Start of stack trace]
Verse.PatchOperationReplace(xpath="/Defs/ThingDef[@Name="LightMechanoid"]/butcherProducts"): Failed to find a node with the given xpath
[End of stack trace]
The top operation is the one that failed, the ones below it are the parents
Source file: E:\SteamLibrary\steamapps\workshop\content\294100\2886997332\1.4\Patches\MechanoidLoot.xml

UnityEngine.StackTraceUtility:ExtractStackTrace ()
Verse.Log:Error (string)
XmlExtensions.ErrorManager:PrintErrors (string,Verse.ModContentPack)
XmlExtensions.PatchOperation_Patch:Postfix (Verse.PatchOperation,bool&,System.Xml.XmlDocument)
(wrapper dynamic-method) Verse.PatchOperation:Verse.PatchOperation.Apply_Patch2 (Verse.PatchOperation,System.Xml.XmlDocument)
(wrapper dynamic-method) Verse.LoadedModManager:Verse.LoadedModManager.ApplyPatches_Patch6 (System.Xml.XmlDocument,System.Collections.Generic.Dictionary`2<System.Xml.XmlNode, Verse.LoadableXmlAsset>)
Verse.LoadedModManager:LoadAllActiveMods ()
Verse.PlayDataLoader:DoPlayLoad ()
Verse.PlayDataLoader:LoadAllPlayData (bool)
Verse.Root/<>c:<Start>b__6_1 ()
Verse.LongEventHandler:RunEventFromAnotherThread (System.Action)
Verse.LongEventHandler/<>c:<UpdateCurrentAsynchronousEvent>b__27_0 ()
System.Threading.ThreadHelper:ThreadStart_Context (object)
System.Threading.ExecutionContext:RunInternal (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object,bool)
System.Threading.ExecutionContext:Run (System.Threading.ExecutionContext,System.Threading.ContextCallback,object)
System.Threading.ThreadHelper:ThreadStart ()

Yeah, the "LightMechanoid" that is failing the patching process is from the BioTech files. So if you only have Royalty, I guess that would explain it. I'm really not playing Rimworld or doing modding right now, and haven't done any conditional patching so immediately know how to fix it, so I'm not sure if/when I would ever get around to making this change, sorry.

Originally posted by RelaxedOtter:

Yeah, the "LightMechanoid" that is failing the patching process is from the BioTech files. So if you only have Royalty, I guess that would explain it. I'm really not playing Rimworld or doing modding right now, and haven't done any conditional patching so immediately know how to fix it, so I'm not sure if/when I would ever get around to making this change, sorry.

i changed my modlist a little, for example by adding VE Mechanoids, and the error no longer pops up... it seems to work now because disassembling mechanoids now gives the desired outcome. Possible Fix?

<li>brrainz.harmony</li>
<li>ludeon.rimworld</li>
<li>ludeon.rimworld.royalty</li>
<li>shashlichnik.srtsexpanded</li>
<li>imranfish.xmlextensions</li>
<li>uuugggg.tdfindlib</li>
<li>uuugggg.tdsbugfixes</li>
<li>unlimitedhugs.hugslib</li>
<li>oskarpotocki.vanillafactionsexpanded.core</li>
<li>vanillaexpanded.achievements</li>
<li>oskarpotocki.vanillaexpanded.royaltypatches</li>
<li>vanillaexpanded.vanillatraitsexpanded</li>
<li>vanillaexpanded.vanillasocialinteractionsexpanded</li>
<li>vanillaexpanded.vfecore</li>
<li>vanillaexpanded.vtexvariations</li>
<li>vanillaexpanded.vpersonaweaponse</li>
<li>vanillaexpanded.vtexe</li>
<li>vanillaexpanded.vfeproduction</li>
<li>vanillaexpanded.vfemedical</li>
<li>vanillaexpanded.vfesecurity</li>
<li>vanillaexpanded.vfearchitect</li>
<li>vanillaexpanded.vfefarming</li>
<li>vanillaexpanded.vpsycastse</li>
<li>vanillaexpanded.vanillatradingexpanded</li>
<li>vanillaexpanded.vbookse</li>
<li>mlie.vanillabooksexpandedexpanded</li>
<li>oskarpotocki.vfe.mechanoid</li>
<li>oskarpotocki.vfe.empire</li>
<li>oskarpotocki.vfe.pirates</li>
<li>vanillaexpanded.vaeaccessories</li>
<li>vanillaexpanded.vee</li>
<li>codeoptimist.jobsofopportunity</li>
<li>bodlosh.weaponstats</li>
<li>tammybee.whereismyweapon</li>
<li>captaingeorge.tradershavemoney</li>
<li>timmyliang.tradehelper</li>
<li>ghxx.techadvancing</li>
<li>linkolas.stabilize</li>
<li>sarg.smartspeed</li>
<li>uuugggg.smartmedicine</li>
<li>dhultgren.smarterconstruction</li>
<li>legodude17.smartdecon</li>
<li>owlchemist.smartfarming</li>
<li>roolo.searchanddestroy</li>
<li>sandy.rpgstyleinventory.avilmask.revamped</li>
<li>arandomkiwi.rimsaves</li>
<li>cabbage.rimcities</li>
<li>uuugggg.replacestuff</li>
<li>legodude17.qualcolor</li>
<li>mehni.pickupandhaul</li>
<li>issaczhuang.muzzleflash</li>
<li>m00nl1ght.mappreview</li>
<li>krafs.levelup</li>
<li>jaxe.bubbles</li>
<li>jkluch.haultostack</li>
<li>smuffle.harvestorganspostmortem</li>
<li>uuugggg.everybodygetsone</li>
<li>nilchei.dynamicdiplomacy</li>
<li>caesarv6.damageindicators</li>
<li>avilmask.commonsense</li>
<li>crashm.colorcodedmoodbar.11</li>
<li>fluffy.blueprints</li>
<li>voult.betterpawncontrol</li>
<li>madeline.modmismatchformatter</li>
<li>meltup.beautifuloutdoors</li>
<li>cedaro.choiceoffirstpsycasterpath</li>
<li>mlie.badcanbegood</li>
<li>syrchalis.doormats</li>
<li>frozensnowfox.filthvanisheswithrainandtime</li>
<li>dubwise.rimefeller</li>
<li>murmur.walllight</li>
<li>arcjc007.wallstuff</li>
<li>arcjc007.walldefenses</li>
<li>dubwise.dubsmintminimap</li>
<li>ltbob.preemptivestrike.rimworld</li>
<li>unlimitedhugs.allowtool</li>
<li>mehni.numbers</li>
<li>zal.moretradeships</li>
<li>creeper.betterinfocard</li>
<li>uuugggg.buildfrominventory</li>
<li>void.charactereditor</li>
<li>cedaro.nohopelessromance</li>
<li>nuff.petsaresafe</li>
<li>victor.wallsaresolid</li>
<li>com.yayo.yayoani.continued</li>
<li>brrainz.achtung</li>
<li>mlie.watergazingspot</li>
<li>smashphil.dropspot</li>
<li>opg.psy</li>
<li>spdskatr.projectrimfactory</li>
<li>spdskatr.projectrimfactory.drones</li>
<li>kathanon.followthevein</li>
<li>hawkwood.faaw</li>
<li>hatti.cleaningarea</li>
<li>falconne.bwm</li>
<li>tikubonn.dontblockdoor</li>
<li>haplo.miscellaneous.training</li>
<li>gerads.removegradualrelationsdecaypatchy</li>
<li>mrgames.noskilldecay</li>
<li>fluffy.worktab</li>
<li>revolus.whatsmissing</li>
<li>uuugggg.whatismypurpose</li>
<li>knight.useyourgun</li>
<li>wemd.handsarenotoutside</li>
<li>wemd.reinforceddoors</li>
<li>sky.autoname.autonameanimals</li>
<li>5katz.commschat</li>
<li>vex.consciousness</li>
<li>uuugggg.ctrlf</li>
<li>dubwise.rimatomics</li>
<li>dubwise.dubsperformanceanalyzer.steam</li>
<li>v1024.ebframework</li>
<li>wit.expandedroofing</li>
<li>uuugggg.fivesecondrule</li>
<li>fyarn.fixablemooddebuffsalert</li>
<li>teiwaz.gtgalpha</li>
<li>mlie.mercerbackpacks</li>
<li>cucumpear.noburny</li>
<li>doug.nojobauthors</li>
<li>zyxabacab.nosympathyforprisoners</li>
<li>owlchemist.powertab</li>
<li>hatti.qualitysurgeon</li>
<li>sirrandoo.rda</li>
<li>weilbyte.snapout</li>
<li>albion.sparklingworlds.full</li>
<li>joseasoler.tradergen</li>
<li>joseasoler.tradingoptions</li>
<li>marvinkosh.ughyougotme</li>
<li>uuugggg.thickarmor</li>
<li>uuugggg.customalerts</li>
<li>scorpio.itemteleporter</li>
<li>relaxedotter.bettermechanoidloot</li>
<li>indeed.stackxxl</li>
<li>mlie.10xcarryingcapacity</li>
<li>dhultgren.useminifiedbuildings</li>
<li>erdelf.minifyeverything</li>
<li>arandomkiwi.raidsforme</li>
<li>oblitus.animalslogic</li>
<li>automatic.bionicicons</li>
<li>dimonsever000.events.specific</li>
<li>denethor0.gainskillpassions</li>
<li>nif.toolbox</li>
<li>neceros.antigrain</li>
<li>fox.simplelearning</li>
<li>nif.architectexpanded.fences</li>
<li>krkr.rocketman</li>