Mobile menu not working

I am using Base Header, in which there is Mobile Menu by default is present. When I open the site in the mobile vie and click the three bars to open the menu,, it do not shows any further pages or menu.. kindly advise me if any thing I am missing or there is any issue..
Screenshots are attached with:
1. Header Builder screenshot: http://prntscr.com/oafacl
2. Menu Screenshot: http://prntscr.com/oafapg
3. Mobile view Screenshot: http://prntscr.com/oafb5q

Hello.

Please provide your site admin access to the private area.

Best Regards

Site admin access is provided in the private area:

Hello,

Check now the mobile menu works.

Best Regards

[Author]

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