On the Analysis tab in ArcGIS Pro, I clicked on the Network Analysis drop down and selected Route. I add some AVL data (thin purple lines with arrows) to my map and follow the lines when adding stops & waypoints to the Stops feature Class. I click Run to solve my route (thick transparent purple lines).
Sometimes I see a message after the routes have been solved but I am still able to access the Show Directions pane to verify that the directions are correct.
I click the Route Layers button in the ribbon to share it to ArcGIS Online then update the sharing settings on the layer and access it in Navigator from an iPad. The majority of routes display as expected but when I click on certain routes I see the Failed to Create Route No Tracker error.