Elias here with Shopify Support. Thank you for reaching out.
I understand that the search and menu bar is not working for your Debut theme. Just to confirm, were there any new apps or custom coding installed recently? Or, does the issue persist on a newly installed Debut theme?
If you're unable to identify what may be causing this issue, and rolling back to an older version of your theme does not resolve the issue, then it looks like we’ll need to access your account in order to resolve this issue. While we’re not able to provide account-specific support via the Shopify Community at this time, our Support team would be happy to continue assisting you through live chat, email, or callback. Please visit the Shopify Help Center and log in to your account to create a support request.
I'd love to know if our Support team can help you identify and resolve this issue. Keep me posted!