I just installed Ghost on Ubuntu 16.04 using the one-click install -> www.adityaseshadri.com

For some reason the default sitemap isn't generating / loading. I am able to see https://adityaseshadri.com/sitemap-posts.xml and https://adityaseshadri.com/sitemap-pages.xml , but not https://adityaseshadri.com/sitemap.xml

Can someone help me resolve this please.