I got an error because I selected a .kurviger file from an email, but Kurviger opened already having a route and overlay from the last time it was open. Kurviger itself suggested I report this. I fixed the problem by deleting last time’s route and overlay and then selecting the .kurviger file from my email again. It then loaded properly.
(Debug information, this helps us helping you, you can remove this if you don’t want to share this data, it should not contain any personal or sensitive information)
Device: Google - Pixel 7 - Android: 13 - WebView: 118.0.5993.81
App-Version: 3.2.3 - 1715
Screen: 412 x 915 px - 2.625dppx