Try to clear your browser cache or use incognito mode. If it doesn't work then try other browsers like firefox or Brave.

If it still doesn't show try to access it with other devices like a mobile phone or laptop.

If all suggestion above doesn't work flash your miner with the latest version from https://www.innosilicon.com/html/support_en/download.html
Then try to access it again let see if it still doesn't work.