"Failed to lock profile. We're just making sure youre progress is recorded properly. Please try again in a couple minutes." error in Fortnite: Save the World

If you receive this error while playing Fortnite: Save the World on your PC, try verifying your game files to clear the error.
- If you are playing on a console, you can follow the steps from How do I troubleshoot crashes, errors, and performance issues in Fortnite on consoles?
If the issue is still occurring after you tried the troubleshooting, please submit a bug report in the game by following the steps found in How to submit a Fortnite bug report in-game