When a user compiles a parent blueprint, this error appears in the outpug log for the child blueprint:
Warning: USimpleConstructionScript::FixupRootNodeParentReferences() - Couldn't find inherited parent component 'WeaponMesh' for 'Barrel' in BlueprintGeneratedClass 'REINST_WeaponMouseGun_C_209' (it may have been removed)
Error in description appears in the output log of the editor
No output log error occurs.
Head over to the existingAnswerHub thread and let us know what's up.