Apparently you disabled some traits that androids aren't supposed to have, but which can't be found.
At least in a similar race mod this was the case.
The error is annoying as it makes the log window pop up.
Could not resolve cross-reference: No RimWorld.TraitDef named Prosthophobe found to give to AlienRace.AlienTraitEntry AlienRace.AlienTraitEntry
Verse.Log:Error(String, Boolean)
Verse.WantedRefForObject:TryResolve(FailMode)
Verse.<>c__DisplayClass15_1:b__0(WantedRef)
Verse.<>c__DisplayClass6_1`1:b__0(Object)
System.Threading.QueueUserWorkItemCallback:WaitCallback_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.QueueUserWorkItemCallback:System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
System.Threading.ThreadPoolWorkQueue:Dispatch()
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback()
Apparently you disabled some traits that androids aren't supposed to have, but which can't be found.
At least in a similar race mod this was the case.
The error is annoying as it makes the log window pop up.
Could not resolve cross-reference: No RimWorld.TraitDef named Prosthophobe found to give to AlienRace.AlienTraitEntry AlienRace.AlienTraitEntry
Verse.Log:Error(String, Boolean)
Verse.WantedRefForObject:TryResolve(FailMode)
Verse.<>c__DisplayClass15_1:b__0(WantedRef)
Verse.<>c__DisplayClass6_1`1:b__0(Object)
System.Threading.QueueUserWorkItemCallback:WaitCallback_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.QueueUserWorkItemCallback:System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
System.Threading.ThreadPoolWorkQueue:Dispatch()
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback()