Sitemap not properly generated – Please Help!

Hello all,

After installing and activating this plugin, the sitemap is created under: http://www.thatdudesblog.com/index.php?xml_sitemap=params=. instead of http://www.thatdudesblog.com/sitemap.xml

How do I fix this? Please let me know.

Thanks

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