mac appstore – Apple Store will not download apps

I cannot download apps from the app store.
I am running Mojave and do not want to upgrade

I have already tried to do the following:

  • Sign in and out of my app store account
  • Delete any app store cache files
  • Kill any app store process and tried again
  • Reinstalled Mojave
  • Installed from a backup
  • Tried to install apps on a different user

Any ideas? Thanks!