Login failed problem happen with “Failed to Create Party” error message shown while trying to login Fortnite seen like mainly due to disruption in the network connection between the server and the console. This article outline the detail steps to fix the “Failed to Create Party” error on Fortnite.
Sign Out/Logout Account on Console
Step 1: Press the Return button to navigate to home screen.
Step 2: Press on the Xbox button on the console.
Step 3: Scroll to the left to highlight the profile name.
Step 4: Select Sign Out from the menu.
Step 1: Press the PS4 button and select Settings from the list.
Step 2: Click on the Account Management > Sign out.
Step 3: Wait for at least 5 minutes and sign in again your account.
Switch User on PS4 Console
Step 1: Press the PS4 button on the console and click on Power > Switch User.
Step 2: Select a different user or create a new one if there is only a single user on your PS4 console.
Step 3: Launch Fortnite.
Step 4: Click on the Log in option when prompted to enter Epic Account.
Step 5: Navigate back to the Power > Switch User.
Step 6: Switch back to the user previously.
Power Cycle the Console and Internet Equipment
Step 1: Shut down and unplug console and the internet router.
Step 2: Press and hold the power button on devices for at least 15 seconds.
Step 3: Plug it back and press the power button to turn it on.
Check whether Service Outage on Fortnite Servers
Step 1: Browse to Downdetector to check if there is a “No Problems in Fortnite” message under the name of the game. If there is a problem with the server, it will be indicated under the name.
Step 2: Wait for the server problems to be cleared or contact customer support.
Source: r/deadbydaylight > Failed to create a party