Posted Sitemap on Google, They said it wasn’t correct?

I'm using the the Fluid store and Fluid WP themes. When I finished my store and submitted to google, I submitted the url to the sitemap (that was automatically generated in the fluid theme) without putting xml or php on the end.

I tried to resubmit, but google wouldn't allow it. weird. I'm hitting the end of my knowledge rope here.

Anybody know how to fix this?

Thanks, -FN

Is there a program/UI to look at all google sheets that are referencing another said google sheet?

The goal is to be able to map out the google sheet web that we’ve built for operations, where each one pulls data in from another sheet.

I’m trying to find a simple way of mapping out what connects to what sheeet, aso that when we move away from the current system we can model the data similarly.