Sitemap Error in Google Search Console

hey everyone i have just installed this plugin before seo framework i have been suing rankmath seo plugin after removing it and installing seo frame work and re submitting the sitemap to google search console its giving me this error : –

This tag was not recognised. Please fix it and resubmit.

Parent tag: urlset

and when i run the sitemap thru w3 validator its giving me this error

Schema Error: Cannot find preset schema for namespace: https://www.sitemaps.org/schemas/sitemap/0.9.

Please help me fix this.