OpenStreetMapProvider GetRoute is Returning Null inside of USA


I am having a strange issue where my GetRoute function is returning null while trying to map a route within the United States. I can get the function to work properly outside of North America, for example in Africa and Europe.

Does anyone know of a reason why GetRoutes wouldn’t work inside of the United States?

Thank you for your time!

What library/framework is this?

We are using the GreatMaps API with WPF.