"Mount and Blade" (22100) and "Mount & Blade: With Fire and Sword" (48720) does not start.

Compatibility Report

• Name of the game with compatibility issues:
  "Mount and Blade" and "Mount and Blade: With Fire and Sword"
• Steam AppID of the games:
  I can’t find them. (I searched at the shop page too)

System Information

• GPU: GeForce GTX 960
• Driver/LLVM version: NVIDIA Driver 430.26
• Kernel version:
• Link to full system information report as Gist:
  https://gist.github.com/Bauju/e7c477fc4f2bfa2230fb55c7626c3442
• Proton version: 4.11-7

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.

I can’t find the APPID.log

Symptoms

When i press "play" at one of the two games, they show me the product keys and when I press "play" at this window, he say, that the game starts. then after two seconds the window closes and after a few seconds later again, the "play"-button changes from "cancel" to normal without any error-notification.
I think, its a problem with Steam-Play because "M&B:Warband" runs very well.
And "M&B" and "M&B:With Fire and Sword" are in the list of games, that are supported by Steam-Play.

Reproduction

Here i founded some errors:
stats_log.txt

Sorry for my bad English. If I can answer in German, please write it to me :)

Start by reviewing the attached stats_log.txt and the linked system information report, then reproduce the launch failure with Proton 4.11-7. The report does not include an AppID log or identify a source file or test; done would require isolating the cause of both games failing to start and verifying a fix with a successful launch.