I have got a sitemap error

Hai can anyone tell me how to recktify this sitemap error

Your Sitemap appears to be an HTML page. Please use a supported sitemap format instead.

I have got this error for one of my sitemaps only which is https://www.insidethemovie.com/post-sitemap4.xml

I am using Rank Math plugin and now deindexing of my ampforwp posts is going on, in search console now I have only 2 valid posts and 3 posts with warning

When I check in google it shows 4 to 5 urls

Checked using this format in google

@GulshanKumar is this because of deindexing amp posts.

Hai guys the error has automatically gone when i check GSC . Thank You

1 Like