Topo Maps US funktioniert nicht

Import trails (tracks) using GPX files you find on the Internet or from your personal GPS track collection.  Organize your trail types by color, for example, mountain bike trails, hiking trails, and OHV trails.  Share trails with others using email or AirDrop.  Topographic maps are useful for recreational activities such as hiking, canoeing, camping, fishing, mountain biking, geocaching, and exploring.  Record your own trails to show where you've been on the map, follow them later, and share with others.  Share flags with others using email or AirDrop.  Import flags from other sources using GPX files and geocache LOC files.  Recorded trails include an elevation profile (distance/elevation chart).  Download maps for areas of interest to view them later when you don't have Internet access or you don't want to use cell data.  Download and view topographic maps covering the United States.  Organize your flag types by color, for example, geocaches, trailheads, and summits.  Trails are included with map downloads.  Add flags (waypoints) to the map to mark your current location or other locations.  Navigate to a flag by following the direction arrow that uses your compass heading. Useful for geocaching.  Choose from 2 map sources: USGS standard topographic or USGS hybrid topographic.  Use location tracking to show where you are on the map, your elevation, and the accuracy of the GPS signal.