Sitemap error

Team, i am having the issue with my website’s sitemaps. whenever i try to open the sitemaps it shows the message error in file 1 on the column 431, no matter which SEO plugin i am using, i have tried all the top SEO plugins but the issue remains the same. I also tried removing blank lines from the functions.php file of theme and the main file of the website, flushed the cache through the hosting provider but all in vein. please help me about this. The SS of the issue is attached for your reference

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