I can't synchronise my activities using Garmin Express on my Mac Book. Software gives an error while uploading to Garmin Connect. A striking detail is that in the list of activities there are two activities which are not on my device. There is even a activity of 1989.
Can you give me a solution to this problem. I've been trying all weekend to get it fixed. I've uninstalled all the existing Garmin software on my MacBook en reinstalled Garmin Express. the problem is not my Ant device because I did have installed the new firmware software without any problems.
HELP ME!