Ican´t see the Navigationbar (3 Stripes) in Mobilview

[tanzsportclub]

Hello all,
my mobile view is unfortunately quite different from the desktop view, the navigation is not visible.
I would be very happy about some help.
tanzsportclub-moerlenbach.weebly.com

[tanzsportclub]

problem solved

[Umaisushi]

How did you solve the problem