Hi. Google Search Console inform us like this: Referenced AMP URL is not an AMP
We do not know what that information is.
Can please anyone help? My website is https://adventurejourney.vn/
Thank you in advance for your help!
Adventure Journey Team!

So I checked the HTML code of your website and I see the line:

<link rel="amphtml" href="https://adventurejourney.vn"/>

Basically this is saying that an AMP alternate mobile version of the page is available at the URL https://adventurejourney.vn

But that's not true. That's your regular HTML page.

Either remove that line of HTML code or change it so that the URL it mentions is actually an AMP page.