Are you observing a BACKEND REJECTED THE CHALLENGE RESPONSE error OR are you unable to connect to other players, craft or open Spoils of War? Please run through the solutions below:
The most common cause of this error is when a player has the Modded realm selected, as opposed to the Official realm.
Your realm can be changed within the Vermintide 2 launcher, using the checkboxes on the right-hand side of the 'Play' button.
Install or Repair Easy Anti-Cheat
Easy Anti-Cheat is the name of the anti-cheat service used for Vermintide 2 and may result in this error if it is not installed or in a corrupted state.
Easy Anti-Cheat can be installed or repaired using the EasyAntiCheat_Setup executable located in the Vermintide 2 'installers' directory. The path to this directory on your PC will be similar to this:
C:\Program Files (x86)\Steam\steamapps\common\Warhammer Vermintide 2\installers\EasyAntiCheat
Verify Integrity of Game Files
The 'Verify Integrity of Game Files' option is accessible via the Steam client and will ensure the installation is complete.
- Right-click Vermintide 2 in your Steam library sidebar
- Select 'Properties'
- Select the 'Local Files' tab
- Select the 'Verify Integrity of Game Files' button
- When complete, close and reopen Steam