You need to upload that file via the “Import All Garmin Data” button in /settings. Paste the link to the file from the email from Garmin into the box. Intervals.icu will download it directly.
You need to upload that file via the “Import All Garmin Data” button in /settings. Paste the link to the file from the email from Garmin into the box. Intervals.icu will download it directly.