I've recently swapped from Polar to Garmin. I've exported all my TCX data from Polar, but when I go to Import in Garmin Connect I'm getting the following error:
dropzone.js?bust=3.18.0.9:27 Sat May 13 2017 10:43:56 GMT-0600 (Mountain Daylight Time) - error uploading file 2015-08-19T05_49_07.000Z_180779694.tcx status(500)
The error on screen is: An error occurred with your upload. Please try again.
Not very helpful. Any suggestions?