Page Not Found - when I create new page (the website uses woocommerce)

Hello! I currently is developing a website using woocommerce. The site is http://supplementfitnessbandung.com/supplement-fitness-bandung . (I haven't use root url as the website is still on progress.)

I'm now stuck in creating a new page as anytime I create new pages, it gives the same error message "Page not found".

The website can only show woocommerce pages and the static page as the home page.

Need some help here...

Thanks!