We have moved Trailforks support to a new help center. Please visit help.trailforks.com for support.
These articles might be out of date.
One possible cause is your Android phone has an old version of the Android Webview. Update this system app on your phone
https://play.google.com/store/apps/details?id=com.google.android.webview&hl=en_CA

It is also recommended to update Google Play Services https://play.google.com/store/apps/details?id=com.google.android.gms&hl=en_CA