[2019] Cant play, says content not ready, already verified. Help please?

• Go into your launcher
• Under Fortnite.. Click on the gear (it's beside launch)
• Click options
• Make sure Fortnite Save the World is checked.
• Click Apply

This will ensure that Fortnite STW is properly installed. If that does not work, then try a full uninstall / re-install.

Thanks for the tag :)