What problem? What problem needs to be resolved by WD or Microsoft? The My Cloud is accessible remotely via the Mycloud.com web portal. Or when using the WD My Cloud mobile app for iOS and Android.
The My Cloud Desktop app/program has been end of life for a number of years now (since 2016). It finally stopped working entirely last year with recent firmware updates to the My Cloud.
If you got a screen, during device setup, asking for a 9-digit code chances are you input the wrong setup page (My Cloud Home) rather than the right setup page for the My Cloud. WD even has a Support Knowledgebase article on the 9-Digit issue with correct links to the setup page, MyCloud.com sign-in page, mobile app links and instructions page.
Again, no solution for what issue?
Edit to add: Further the single bay/single drive My Cloud models are basicly either end of life support themselves or have very little support.
A number of single bay/single drive software programs are End of Life. These include WD Sync and WD Access in addition to WD Desktop.
Another Edit to Add: If you have having trouble accessing a local network My Cloud device using Windows File Explorer, this could be due to Microsoft disabling the SMB 1.0/CIFS option. Typically new Windows 10 installs have this option disabled. Microsoft put out a patch last year that disabled this setting for security reasons, it affect most NAS manufacturers not just WD. The solution is to re-enabled this setting.