connect garmin 網頁板 首頁無法正常顯示

This page will briefly appear as normal information when you enter it, but then it will become blank

All working from here. Have you tried a different web browser or cleared cache?

I had the same problem some time ago. The reason for this is an outdated browser. The new home page uses some JavaScript functions that the old browser doesn't know.

https://forums.garmin.com/apps-software/mobile-apps-web/f/garmin-connect-web/373096/garmin-connect-web-blank-home-screen-after-logging-in/1781960#1781960

So update your browser or try another one, as seilogramp has already recommended.