PEnable verbose logs in Game's settings > Advanced tab > 'Enable verbose logs' before reporting an issue.
BBi try to launch another games and the problem is the same
Bmessage.txt4.12KB
PWhat if you disable umu? 
PPthats odd
PBBBPPP>ERROR: _v2-entry-point (umu) cannot be found in '/home/deck/.local/share/umu/steamrt3'
> Runtime Platform missing or download incomplete
> Traceback (most recent call last):
> File "/home/deck/.var/app/com.heroicgameslauncher.hgl/config/heroic/tools/runtimes/umu/umu_run.py/__main__.py", line 95, in <module>
> sys.exit(main())
> ^^^^^^
> File "/home/deck/.var/app/com.heroicgameslauncher.hgl/config/heroic/tools/runtimes/umu/umu_run.py/__main__.py", line 90, in main
> return umu_run(args)
> ^^^^^^^^^^^^^
> File "/home/deck/.var/app/com.heroicgameslauncher.hgl/config/heroic/tools/runtimes/umu/umu_run.py/umu/umu_run.py", line 910, in umu_run
> command: tuple[Path | str, ...] = build_command(env, UMU_LOCAL / version[1], opts)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/home/deck/.var/app/com.heroicgameslauncher.hgl/config/heroic/tools/runtimes/umu/umu_run.py/umu/umu_run.py", line 314, in build_command
> raise FileNotFoundError(err)
> FileNotFoundError: _v2-entry-point (umu) cannot be found in '/home/deck/.local/share/umu/steamrt3'
> Runtime Platform missing or download incomplete
> ============= End of log =============