Production mode error since recent changes

NodeInvocationException: StaticInjectorError(n)[InjectionToken Application Initializer -> InjectionToken DocumentToken]:
StaticInjectorError(Platform: core)[InjectionToken Application Initializer -> InjectionToken DocumentToken]:
Right-hand side of 'instanceof' is not an object
TypeError: StaticInjectorError(n)[InjectionToken Application Initializer -> InjectionToken DocumentToken]:
StaticInjectorError(Platform: core)[InjectionToken Application Initializer -> InjectionToken DocumentToken]:
Right-hand side of 'instanceof' is not an object