Hello,
my last run doesn't sync from device (forerunner 945). i connected the device with usb and get the fit file, manual import is also failing. i think fit file seems corrupted even if i succeeded in uploading it in strava. i tried multiple things to fix it without success.
i also would try to indentify what could have corrupted the fit file (fit file size / ultra run mode / charging device during activity / ...)
I hope someone could help me fixing file. thank a lot