Google cache - 404

First of all - I'm really glad this project exists

I have an SEO problem. When i look at the cached version of my website (cache:https://www.techjob.co.il), I get a 404 page. I can not figure out why.

For example: http://webcache.googleusercontent.com/search?q=cache%3Ahttps%3A%2F%2Fwww.techjob.co.il&oq=cache%3Ahttps%3A%2F%2Fwww.techjob.co.il&aqs=chrome..69i57j69i58.5566j0j4&sourceid=chrome&ie=UTF-8

I'd be happy if someone could explain the problem.

Thanks in advance, Naor