Lost from Finder on OS X 11.2.3

My Cloud OS 5 Personal & Network Attached Storage My Cloud EX Series
1

My MyCloud Ultra EX2 disappeared from my finder on OS X 11.2.3. Can log in on browser.

  1. Why does it happen?
  2. How to restore?
    Thanks.
2

Hello,

Please refer to the following KBA article: Error

3

Thank you.