Running First Aid on "Macintosh HD" Fails in Recovery Mode - (-69845) 2019 iMac Intel Based

Hello,

I followed the steps (see below) you provided. However, during Step 5, I get the -69716 Error Code. (Screen Shot Below) I am lost what to do at this point. Thank you for any help.

Intel-based Mac:

1.-Turn off Find My Mac and sign out of your Apple ID

To turn off Find My Mac, go to System Settings > Apple ID > iCloud > Find My Mac, and toggle Find My to OFF.

Then click the back button to return to System Settings > Apple ID, and click “Sign Out…” to sign out of your account.

2.-Back up your Mac

Back up your Mac using Time Machine.

3.-Start Internet Recovery

Boot to Internet Recovery (Option-Command-R or Option-Shift-Command-R) to prepare to downgrade to the version of macOS that came with your Mac or the closest version that’s still available.

4.-Erase volume group

Open Disk Utility and select “Macintosh HD”. Select the “Erase Volume Group” (not just the volume “Macintosh HD”). You may have unexpected results if you do not select ”Erase Volume Group”. When complete, quit Disk Utility.

5.-Reinstall macOS in Internet Recovery

Click on Reinstall macOS and follow the onscreen instructions. If Find My was enabled on the Mac, you will need to activate the Mac when the reinstall process completes. At the end of the activation process, you will be prompted to restart the Mac. More details about reinstalling macOS are available here.

I contacted Apple Support and they told me it cannot be repaired online via Apple hat and that an Apple Technician needs to look at the computer. So I have to take it to Apple Store for a technician to give me a repair estimate.

Thank you. I typed in the wrong version number. My bad. Sorry, I reposted the question with the correct information. Thank you.