Brunn theme full page menu not working in creative agency homepage, please help

Envato Customers Web and Code
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1

Please help, when i install and activate brunn theme and activate creative agency homepage, the full screen menu is not working please help site yellow.ideasya.asia

2

Hi,

Contact with your purchase item author hope they will helped!
https://help.market.envato.com/hc/en-us/articles/203039054-How-to-contact-an-author

Thanks!