Roguebook How to Fix the GameboxEngineService ERROR

The battle does not load properly. Instead, the following screen appears:

The error message states that the GameboxEngineService encountered an error at initialization, and that you should check the logs for more information:

There are actually 67 problematic files, and it is possible to remove the duplicate ids with Python[gist.github.com]. However, you will encounter other kinds of error afterwards, because the files have not been updated in a long time. For instance:

So what you want instead is to fetch the latest build of the game!

To do so:

• Open Steam’s console, e.g. by typing Win+R and then:
  steam://open/console
• Write down the manifestID of the latest build, which you can find on SteamDB[steamdb.info].
  
• Download the game content with:
  download_depot 1076200 1076201 manifestID

  For instance, on the day of the game release (June 17, 2021):

  download_depot 1076200 1076201 7529912476901754664

  NB: The depotID for Windows is 1076201. For Mac, 1076202. For Linux, 1076203.

• Copy steamapps\content\app_1076200\depot_1076201 to steamapps\common\Roguebook
  which, in case you need a more detailed process, means to:
• Rename Roguebook to Roguebook_old in steamapps\common\
• Copy depot_1076201 from steamapps\content\app_1076200\ to steamapps\common\
• Rename depot_1076201 to Roguebook in steamapps\common\

If you want to update your build in the future, check the history of manifestIDs[steamdb.info] for game updates, or the history of changes[steamdb.info] for a more verbose output.