Snipet editor not showing on pages/posts

Hi,

I am preparing one site, anyway yesterday I’ve created few pages and on Home page yesterday I filled with Snipet editor all data (SEO title and keyphrase).
Today I wanted to customise it but habe no view on Snipet editor. Also editor doesn’t appear on posts.

I didn’t activated no plugins from yesterday but for sure I also deactivated all plugins and it’s not working. Also I checked SEO settings per your link:
https://yoast.com/help/yoastseo-meta-box-missing/

Here is the link of view prb:
http://www.semtis.si/seo-prb/

Pls check and let me know.

Best regards

The page I need help with: [log in to see the link]