Not sure if you still need this, but posting it for future info:
We were unable to upgrade to the latest hotfix, but this workaround I found works ok:
- navigate to the CCC installer folder -> prereqs -> right click on offlinechocolatey.ps1 > run as administrator
- open an admin command prompt -> choco upgrade chocolatey --force-> accept install
- restart shell as admin
- run choco feature enable -n allowemptychecksums
Now you should be able to install without any errors.