確實是網站有問題, Garmin Connect 北美區的 Support Service 留了一個訊息在 Garmin Forum。
We've heard some reports from users who are running into errors when uploading data to Garmin Connect. The issue appears to have started around April 22nd. Please note that we are looking into this issue and hope to have things sorted out as soon as possible. we apologize for any inconvenience this is causing.