If you are having trouble using an add-on after downloading and restarting your console, then the following options may help you.

How to Restore Game Licences

Game licences authorise you to play your purchased content on the console you are signed in to with your PSN account.

  1. From the Home screen, open the main Settings menu.
  2. Choose Users and Accounts.
  3. Select Other.
  4. Select Restore Licences.
  5. Once complete, try downloading your Add-ons again.

How to Enable PS5 Console Sharing

PS5 Console Sharing and Offline Play is automatically enabled on the PS5 console you use to sign in to  PlayStation™ Network for the first time.

  1. Go to Settings, Users and Accounts, Other, Console Sharing and Offline Play.  
  2. Select Enable.