Q: This action could not be completed. Try again. iCloud for Windows

I installed iCloud for my PC on my Windows 10 desktop, but whenever I try to sign-in I receive the Verification Error: "This action could not be completed. Try again." I can sign-in to iCloud.com from the browser on the same computer without any issues. Per earlier threads on this issue I have tried running the iCloud app as the Administrator. I have also manually added exceptions to the Windows firewall, but the error persists.

What is the next course of action?

Thank you,

Sean