uploading course from Outdooractive to Garmin connect has stopped working.
uploading course from Outdooractive to Garmin connect has stopped working.
uploading course
To make sure, you're trying to upload a course, not a route and not an activity. Are you using Garmin Connect Web to do the course import?
From https://connect.garmin.com/modern/courses
Then click on import

If you're still getting the error, please zip then post the specific file here. We can see what the problem might be.