I have a Forerunner 955 Solar and a Garmin HRM Plus Pro, on my last two open water swims i can't sync my training. I see it on my watch but i can't sync with garmin connect. When i connect the watch to the computer and import the .fit file manually i get the error that the file is not supported... it started happening this last friday, i never had any issues before. Any help on this topic?
