Tried your link. According to Strava:
The page you’re looking for doesn’t exist
Sorry missed to made it public
I was able to export from Strava as a GPX file, then import into Garmin Connect courses. Then send to my watch from the mobile app.
Ride to Altbrandsleben - https://connect.garmin.com/modern/course/187977687.
What happens when you do it?
I see.
i am getting an error saying „there is a problem uploading the file. Try it again“. Made it on mac os with safari.
You are apparently trying to import a non-activity GPX file on the Data Import page from the top menu. As written there, it serves exclusively for importing activity data files
If you are trying to import a GPX course for navigation, you have to use the import function on the Courses page:
https://connect.garmin.com/modern/courses
i am getting an error
As trux mentioned, you're in the wrong import location. I linked to the correct import location in my previous post.
then import into Garmin Connect courses.