Non Canonical Page in Sitemap

I am getting an error for this URL "https://www.travelsandtreasures.com/landing" 

Is there a way to fix this?

Thanks so much!

Personally, I wouldn't worry about it at all. 

 <link rel="canonical" href="https://www.travelsandtreasures.com"/>

You can see on that page it has the canonical tag which is informing search engines it is part of the homepage. 

Thank you!