get null 404 error on production #832

Hi, I have my app working on local machine without any errors, once I built for production and published the app on my domain, I got this error (which doesn't effect the app)

GET http://murhafsousli.com/null 404 (Not Found)     null:1 

I looked in my code for hours I didn't find any get request, why is it happening!
and when I test production on local by adding enableProdMode(); in app component, I get this error instead of the previous one:

TypeError: Cannot read property 'probe' of undefined(…)

I think the problem is in _decorateComponentRef in environment.ts but I don't know how to fix it.