Why won't Sim City launch?

I have been experiencing the same issues since November or December of last year. All other games accessed via the EA app launch just fine, only SimCity fails. The error messages occur as follows:

1. I login to my EA app, select SimCity, and click Play. 

2. An error message pops up that reads, This game requires permissions This game requires administrative privileges. Do you want to grant access and launch the game? OK CLOSE

3. Selecting OK results in another error message pop-up that reads, Failed to launch game An error on our end caused the launch to fail. Try again a little later. OK

I've done every single thing I can find to troubleshoot/resolve this issue, including every step listed on this page: https://help.ea.com/en/help/ea/ea-app/game-download-install-load-troubleshoot/

I've also followed a fix recommended by the chat advisor, which was to uninstall the EA app and delete the associated registry keys.

Nothing has worked, I keep getting the same error messages described above.

I also cannot resume my case or begin a new one, only the CLOSE CASE option is available via help.ea.com. Clicking RESUME CASE  just puts me in to a loop of redirects back to the My Cases page.

I also attempted to get a refund for SimCity since I am no longer able to access the game that I paid for, but that option is also unavailable to me.