Menu problem

Hello, I had been editing web https://www.taurid.cz, everything goes well, but then I tried to edit Menu on the top of the page and WP wrote me, that i dont have permission. Now Menu doesn′t work well, the most of options in menu refers me to home page (for exapmple References). In some cases page write:

Oops! That page can’t be found.

It looks like nothing was found at this location. Maybe try a search?

I also used https://www.taurid.cz/customize.php to edit Menu, maybe this will be problem with permissions? I clic there to navigation…

Please, can ou help me?

• This topic was modified 9 months, 2 weeks ago by ifcasim.
• This topic was modified 9 months, 2 weeks ago by ifcasim.
• This topic was modified 9 months, 2 weeks ago by ifcasim.

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