[Bug] "No supported versions to install" on Fedora 44

[kg333]

I'm getting a "no supported versions" error on a GOG installer for Baldur's Gate Enhanced Edition. I've imported the game, imported a version, marked that version as setup-mode for Linux and pointed at the provided .sh script, and added the game to my library, but it doesn't want to let me install.

OS is Fedora 44 with client Drop.Desktop.Client-0.4.0-1.x86_64.rpm. Server is 0.4.0-rc-5.

[DecDuck]

You may need to install umu-launcher because we use it to launch inside of the Steam Linux runtime.

[kg333]

You're right, that got a bit further. I installed umu-launcher-1.4.1.fc43.x86_64.rpm and I'm now able to select the version to install. It does fail on setup with the following log.

Based on the error, I suspect this is a network problem on my end or an upstream problem with umu-launcher,if you want to close this bug report. I'll update back here for posterity either way once I find a fix.

INFO: umu-launcher version 1.4.1 (3.14.6 (main, Jun 11 2026, 00:00:00) [GCC 16.1.1 20260515 (Red Hat 16.1.1-2)])
CRITICAL: steamrt4 validation failed
CRITICAL: Could not find steamrt4_platform_* in '/home/matthew/.local/share/umu/steamrt4'
ERROR: repo.steampowered.com returned the status: 403
Traceback (most recent call last):
  File "/usr/bin/umu-run", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/usr/lib/python3.14/site-packages/umu/__main__.py", line 90, in main
    return umu_run(args)
  File "/usr/lib/python3.14/site-packages/umu/umu_run.py", line 1045, in umu_run
    command: tuple[str, ...] = build_command(env, layer, opts)
                               ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/umu/umu_run.py", line 379, in build_command
    if (launch_client := layer.launch_client) and env.get("UMU_CONTAINER_NSENTER") == "1":
                         ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/umu/umu_runtime.py", line 621, in launch_client
    if self.runtime:
       ^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/umu/umu_runtime.py", line 583, in runtime
    self._runtime = self._resolve(self._shim)
                    ~~~~~~~~~~~~~^^^^^^^^^^^^
  File "/usr/lib/python3.14/site-packages/umu/umu_runtime.py", line 576, in _resolve
    return CompatLayer(self.required_runtime.path, shim)
  File "/usr/lib/python3.14/site-packages/umu/umu_runtime.py", line 553, in __init__
    with Path(path).joinpath("toolmanifest.vdf").open(encoding="utf-8") as f:
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.14/pathlib/__init__.py", line 771, in open
    return io.open(self, mode, buffering, encoding, errors, newline)
           ~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/home/matthew/.local/share/umu/steamrt4/toolmanifest.vdf'