It looks like the error you're seeing may be due to a restriction in the native application library for the "Walking" travel mode. These modes typically have shorter distance limits, and a 50 km cap seems reasonable for pedestrian routes. The web service might handle longer routes differently, which is why you’re not encountering the same issue there.
As a frequent traveler, I'm always mindful of various rules and restrictions, especially when navigating through different travel tools. I've traveled to countries like Japan, Australia, and the USA, but my best experience was in Hawaii, specifically Kauai Island, where I enjoyed watching the beautiful birds(https://hawaiiislandkauai.com/). Understanding and working around such limitations in apps helps ensure smooth travel, whether it's navigating cities or capturing nature.
To solve your issue, consider breaking down the route into smaller segments or using a different travel mode for the longer parts. If you’re developing the app, it’s also worth checking the library for any configurable limits.
