Modifying header in the main page

I have tried several times to change the side menu in the main page, however it gives me an error as per attached screenshot for the mobile version,
And the change is applied on all other pages other than the home page kindly support us to solve this issue

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I have made it as default header however the issue still exist in the home page

Hello,

I would like to request temporary admin access to the website to take a better look at the issue there.

Looking forward to collaborating with you!

Kind Regards

[Author]

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