Menu with too many links?

Hi support team,

I 've got a problem with a menu, not showing all links, because the tree is too deep.
Please visit our developer envirement:
https://www.weinunion.de/winzer-Argentinien.html

The menu item is "Länderauswahl", select for example USA.
I can not select all items, and furthermore I can't scroll the menu to reach the not seen items.

How can I solve this problem?
Thanks in advance.

Regards
Markus

Solved by another menu