Unable to 'End' marking points on the map

Using the tools (like volume, area, etc) to mark points on the map, I am unable to end the marking. It says to click on the starting point, but it just creates another point with the original. I am using Chrome, but Edge doesn’t show the tools menu and IE doesn’t display the map. Any ideas on how to fix this?
Thanks!

There should be a finish button. I wouldn’t use IE or Edge. We recommend Chrome or Firefox. Let me know if those work for you.

There should be a checkbox in the bottom right that lets you complete the shape if you’re having trouble clicking the last point.