Menu not showing on mobile version Shopify dawn theme

This is my website url oldtree.co.uk

Hey @User990 .

Thanks for reaching out.

Looking into the URL that you have provided, it looks like I am receiving a 403 Forbidden error when attempting to load into your online store. Could you let us know which .myshopify.com URL? As this context will allow us to take a closer look at the online store and issue occurring.

Looking forward to your response.