Garmin Basecamp Crashes While Uploading to Fenix 6

I have a kml file with waypoint for an upcoming river trip I would like to upload to my Fenix 6 Sapphire. I have imported the file into Garmin Basecamp and created a list.  When I go to upload my list to my device Basecamp crashes and closes. Is Fenix 6 compatible with waypoints. If so, is there a work around way to upload these waypoint to the watch via Windows Explorer?