If you're seeing the error message above, verifying Fortnite game files and/or checking Fortnite installation options will likely restore your connection.
Follow the steps below for more details.
Note: If you're seeing this error in Save the World (available on Playstation, Xbox & PC), the issue might be that your backpack is full. Create additional space in your backpack before launching a mission if this is the case.
Verifying your Fortnite game files may resolve this issue.
Checking both Battle Royale and Save the World boxes for your installation options may resolve your issue.