[Bug 52113] New: Killing Floor 2 : Item Server not connectable

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52113

Bug ID: 52113
           Summary: Killing Floor 2 : Item Server not connectable
           Product: Wine
           Version: 6.21
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Overview:
    In Killing Floor 2, the Item Server cannot be reached. In consequence,
neither the Inventory nor the Store are available from within the game.

Steps to Reproduce: 
    1) Launch Killing Floor 2.
    2) In the main menu, an icon should tell the connectivity with the Item
Server. That icon shows the server is unreachable.
    3) Access the Inventory tab. It should be filled with your custom items,
but it always shows empty.
    4) Access the Store tab. It should be filled with store offers, but it
always shows empty.

Build Date & Hardware:
    Manjaro stable - Xfce - kernel 5.10.79-1 - 2021-11-16

The issue has been happening from a long time now. As for today's
reference:
    - Failed to reach the steps to reproduce the issue with Development Wine:
        - Development Wine built locally from source
        - Steam (for Windows) installed through Wine
        - Steam refuses to install Killing Floor 2 : "invalid platform"
    - Issue reproduced with:
        - Steam (for Linux) Beta
        - Proton-6.21-GE-2 (based on Wine 6.21)

Additional Builds and Platforms: 
    Manjaro stable - Xfce - kernel 5.10.79-1 - 2021-11-16

The issue does not (yet) reproduce with:
    - Steam (for Linux) Beta
    - Proton 6.3-8 (based on Wine 6.3)