XML sitemap not working??

So I just deleted all sitemap plugins I’ve used since this plugin has a feature to create a sitemap.

However, none of my sites now will show the sitemap even though there is a sitemap.xml file on the root. I also get this error

Error loading stylesheet: A network error occurred loading an XSLT stylesheet:https://mydomain.com/wp-content/plugins/google-sitemap-generator/sitemap.xsl

Anyone know what the deal is?

Thank you!
Jeremy