When Updating Redirected to Spam Site

I can’t update this plugin. I get re-directed to http://doctoraccess.eu/?action=upgrade-plugin&plugin=google-sitemap-generator%252Fsitemap.php&_wpnonce=a9d207b9b2 when I try. I’m not facing any problem with updating any of my other plugins.

https://wordpress.org/plugins/google-sitemap-generator/