Looks like you're missing a name pattern:
Error processing pattern
at UNM.Parser.Implementation.NameParser.Process(PatternProcessingParameters parameters)
at Bronze.Common.Services.UnmNameSource.MakeUnitName(UnitData unitData, Tribe owningTribe)
at Bronze.Common.World.Data.Structure.UpdateStructureOperation(SimulationContext context)
at Bronze.Common.World.Data.Structure.StepSimulation(SimulationContext context)
at Bronze.Common.Gameplay.WorldSimulator.StepSimulation(Single elapsedSeconds)
at Bronze.Common.GameState.States.GameplayState.Update(Single elapsedSeconds, InputState inputState, IAudioService audioService, Boolean inForeground)
at Bronze.Monogame.BronzeAgeGameBase.Update(GameTime gameTime)
Inner Exception Follows
No list matching name: _T_unit_name
at Bronze.Common.Services.MultifileNamelistSource.GetNamelist(String name)
at UNM.Parser.Implementation.NameParser.ProcessSubPattern(StringBuilder resultBuilder, PatternProcessingParameters parameters, PatternToken token)
at UNM.Parser.Implementation.NameParser.DoProcess(PatternProcessingParameters parameters)
at UNM.Parser.Implementation.NameParser.Process(PatternProcessingParameters parameters)
Happened after I build some Twelper Infusers, probably when the units finished training.