This is caused by Graphic Chair Overhaul. I noticed this one too and I have yet to determine how it should be best handled because there appears to be some strange cross-talk in how those two mods are dealing with one another. In the meantime, you can run this mod after it, or if that doesn't work run Graphic Chair Overhaul before GloomyFurniture.

after i did what you ask the error is gone but there is another one popped up!

XML error: Duplicate XML node name stuffCategories in this XML block: <ThingDef ParentName="BenchBase"><defName>FueledSmithy</defName><label>fueled smithy</label><description>A wood-fueled station for smithing non-mechanical weapons and tools.</description><thingClass>Building_WorkTable</thingClass><graphicData><texPath>Things/Building/Production/GL_Smithy</texPath><graphicClass>Graphic_Multi</graphicClass><shaderType>CutoutComplex</shaderType><drawSize>3.7</drawSize><shadowData><volume>(2.8, 0.35, 0.59)</volume><offset>(0, 0, 0.08)</offset></shadowData><damageData><cornerTL>Damage/Corner</cornerTL><cornerTR>Damage/Corner</cornerTR><cornerBL>Damage/Corner</cornerBL><cornerBR>Damage/Corner</cornerBR></damageData></graphicData><costStuffCount>75</costStuffCount><stuffCategories><li>Metallic</li><li>Woody</li><li>Stony</li></stuffCategories><costList><Steel>40</Steel></costList><altitudeLayer>Building</altitudeLayer><fillPercent>0.5</fillPercent><useHitPoints>True</useHitPoints><statBases><WorkToBuild>3000</WorkToBuild><MaxHitPoints>180</MaxHitPoints><Flammability>1.0</Flammability><Cleanliness>-3</Cleanliness></statBases><size>(3,1)</size><designationCategory>Production</designationCategory><passability>PassThroughOnly</passability><pathCost>70</pathCost><hasInteractionCell>True</hasInteractionCell><interactionCellOffset>(0,0,-1)</interactionCellOffset><surfaceType>Item</surfaceType><constructionSkillPrerequisite>4</constructionSkillPrerequisite><inspectorTabs><li>ITab_Bills</li></inspectorTabs><building><spawnedConceptLearnOpportunity>BillsTab</spawnedConceptLearnOpportunity></building><comps><li Class="CompProperties_Refuelable"><fuelConsumptionRate>80.0</fuelConsumptionRate><fuelCapacity>50.0</fuelCapacity><fuelFilter><thingDefs><li>WoodLog</li><li>Bamboo</li><li>VG_Biofuel</li></thingDefs></fuelFilter><consumeFuelOnlyWhenUsed>true</consumeFuelOnlyWhenUsed></li><li Class="CompProperties_AffectedByFacilities"><linkableFacilities><li>ToolCabinet</li></linkableFacilities></li></comps><placeWorkers><li>PlaceWorker_ShowFacilitiesConnections</li></placeWorkers><researchPrerequisites><li>Smithing</li></researchPrerequisites><costStuffCount>60</costStuffCount><stuffCategories><li>Metallic</li><li>Woody</li></stuffCategories></ThingDef>
Verse.Log:Error(String, Boolean)
Verse.XmlInheritance:CheckForDuplicateNodes(XmlNode, XmlNode)
Verse.XmlInheritance:ResolveXmlNodeFor(XmlInheritanceNode)
Verse.XmlInheritance:ResolveXmlNodesRecursively(XmlInheritanceNode)
Verse.XmlInheritance:ResolveXmlNodesRecursively(XmlInheritanceNode)
Verse.XmlInheritance:ResolveXmlNodesRecursively(XmlInheritanceNode)
Verse.XmlInheritance:ResolveXmlNodes()
Verse.XmlInheritance:Resolve()
RIMMSLoadUp.ParseAndProcessXMLPatch:Prefix(XmlDocument, Dictionary`2)
Verse.LoadedModManager:ParseAndProcessXML_Patch1(XmlDocument, Dictionary`2)
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__1()


XML error: Duplicate XML node name costStuffCount in this XML block: <ThingDef ParentName="BenchBase"><defName>FueledSmithy</defName><label>fueled smithy</label><description>A wood-fueled station for smithing non-mechanical weapons and tools.</description><thingClass>Building_WorkTable</thingClass><graphicData><texPath>Things/Building/Production/GL_Smithy</texPath><graphicClass>Graphic_Multi</graphicClass><shaderType>CutoutComplex</shaderType><drawSize>3.7</drawSize><shadowData><volume>(2.8, 0.35, 0.59)</volume><offset>(0, 0, 0.08)</offset></shadowData><damageData><cornerTL>Damage/Corner</cornerTL><cornerTR>Damage/Corner</cornerTR><cornerBL>Damage/Corner</cornerBL><cornerBR>Damage/Corner</cornerBR></damageData></graphicData><costStuffCount>75</costStuffCount><stuffCategories><li>Metallic</li><li>Woody</li><li>Stony</li></stuffCategories><costList><Steel>40</Steel></costList><altitudeLayer>Building</altitudeLayer><fillPercent>0.5</fillPercent><useHitPoints>True</useHitPoints><statBases><WorkToBuild>3000</WorkToBuild><MaxHitPoints>180</MaxHitPoints><Flammability>1.0</Flammability><Cleanliness>-3</Cleanliness></statBases><size>(3,1)</size><designationCategory>Production</designationCategory><passability>PassThroughOnly</passability><pathCost>70</pathCost><hasInteractionCell>True</hasInteractionCell><interactionCellOffset>(0,0,-1)</interactionCellOffset><surfaceType>Item</surfaceType><constructionSkillPrerequisite>4</constructionSkillPrerequisite><inspectorTabs><li>ITab_Bills</li></inspectorTabs><building><spawnedConceptLearnOpportunity>BillsTab</spawnedConceptLearnOpportunity></building><comps><li Class="CompProperties_Refuelable"><fuelConsumptionRate>80.0</fuelConsumptionRate><fuelCapacity>50.0</fuelCapacity><fuelFilter><thingDefs><li>WoodLog</li><li>Bamboo</li><li>VG_Biofuel</li></thingDefs></fuelFilter><consumeFuelOnlyWhenUsed>true</consumeFuelOnlyWhenUsed></li><li Class="CompProperties_AffectedByFacilities"><linkableFacilities><li>ToolCabinet</li></linkableFacilities></li></comps><placeWorkers><li>PlaceWorker_ShowFacilitiesConnections</li></placeWorkers><researchPrerequisites><li>Smithing</li></researchPrerequisites><costStuffCount>60</costStuffCount><stuffCategories><li>Metallic</li><li>Woody</li></stuffCategories></ThingDef>
Verse.Log:Error(String, Boolean)
Verse.XmlInheritance:CheckForDuplicateNodes(XmlNode, XmlNode)
Verse.XmlInheritance:ResolveXmlNodeFor(XmlInheritanceNode)
Verse.XmlInheritance:ResolveXmlNodesRecursively(XmlInheritanceNode)
Verse.XmlInheritance:ResolveXmlNodesRecursively(XmlInheritanceNode)
Verse.XmlInheritance:ResolveXmlNodesRecursively(XmlInheritanceNode)
Verse.XmlInheritance:ResolveXmlNodes()
Verse.XmlInheritance:Resolve()
RIMMSLoadUp.ParseAndProcessXMLPatch:Prefix(XmlDocument, Dictionary`2)
Verse.LoadedModManager:ParseAndProcessXML_Patch1(XmlDocument, Dictionary`2)
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__1()


[Gloomy Vanilla] Patch operation Verse.PatchOperationFindMod(GloomyFurniture) failed
file: F:\Program Files (x86)\Steam\steamapps\workshop\content\294100\1697864590\Patches\Vanilla.xml
Verse.Log:Error(String, Boolean)
Verse.PatchOperation:Complete(String)
Verse.LoadedModManager:ClearCachedPatches()
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__1()

it seems like when i disable your mod and leave the gloomy alone it works perfectly fine.

I see. There must be another mod you have that changed the Fueled Smithy to allow different materials. I think I can fix this by rewriting my patch operation. Thanks for the report, I'll see what I can do!

Okay, I deployed a patch. However I am sort of "working blind" here as I do not get this error, as I imagine you are using a mod that I am not. This mod will now no longer mess with fueled smithy and fueled stove if it detects another mod already made them Stuff-enabled.

thank you i will try to test it again.. if there is yet another error i will post all my mods.. and i help you list out the incompatibilities

whoever having an error "benchbase" like me just in case i manage to solve it by putting the other mod called "Decore" to higher order however i cannot solve the [Gloomy Vanilla] Patch operation Verse.PatchOperationFindMod(GloomyFurniture) failed :(

Decore, eh? I have not heard of this mod before, but it looks like it does a lot to the game and I can see how it might conflict. I'll install it and see if I can make it work properly. Thanks!

Found a mod error. Probably a mod conflict because i have a lot of mods. When used alone with gloomy the error is gone. Thanks for your hardwoork.
Logs : git*io/fjq3P

Sorry for my english.

Hello - there is little I can do about this error. What is happening is another mod trying to modify the research bench without first checking if another mod has already done this. If you place Gloomy Vanilla lower in your load order, after whichever mod is the culprit, it should fix it though.

Hi. Thanks for explantation. Maybe conflict with other furniture mod i have. I have more furniture and more linkable. I'l check it back later if i have time.