Export to file doesn't work

My last activity wasn't synced to Strava, i tried to export it manually which also doesn't work, but from network log i see that https://connect.garmin.com/download-service/export/gpx/activity/ returns 503 status

<html><body><h1>503 Service Unavailable</h1>
No server is available to handle this request.
</body></html>
So m y questions:
- why it doesn't show any error?
- why you system status is green?