Hey everyone, this is my first post here and I need some help with a map I'm working on.

I'm trying to create a tapered river but for some odd reason when I click stroke path, either only the two anchor points are filled by the brush or nothing is filled. I checked my brush settings and spacing was checked, so I'm not sure why this is happening. Nothing online seems to be working for me and this problem is very frustrating. Can someone please help? Thanks in advance.