xpra doesn't start: uinput error

[ndias]

Describe the bug
xpra doesn't start

To Reproduce
Steps to reproduce the behavior:

1. xpra start :100 --exit-with-children --start-child=gpodder

System Information (please complete the following information):

• Server OS: Fedora 37
• Client OS:
• Xpra Server Version xpra-4.4.2-10.fc37.x86_64
• Xpra Client Version

Additional context

cat /run/user/1000/xpra/100/server.log.new
xpra main error:
Traceback (most recent call last):
  File "/usr/lib64/python3.11/site-packages/xpra/scripts/main.py", line 142, in main
    return run_mode(script_file, cmdline, err, options, args, mode, defaults)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/site-packages/xpra/scripts/main.py", line 451, in run_mode
    return do_run_mode(script_file, cmdline, error_cb, options, args, mode, defaults)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/site-packages/xpra/scripts/main.py", line 486, in do_run_mode
    return run_server(script_file, cmdline, error_cb, options, args, mode, defaults)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/site-packages/xpra/scripts/main.py", line 1836, in run_server
    return do_run_server(script_file, cmdline, error_cb, options, args, mode, display, defaults)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/site-packages/xpra/scripts/server.py", line 759, in do_run_server
    return _do_run_server(script_file, cmdline,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/site-packages/xpra/scripts/server.py", line 1221, in _do_run_server
    use_uinput = has_uinput() and opts.input_devices.lower() in ("uinput", "auto") and not shadowing
                 ^^^^^^^^^^^^
  File "/usr/lib64/python3.11/site-packages/xpra/server/server_util.py", line 405, in has_uinput
    import uinput
  File "/usr/lib64/python3.11/site-packages/uinput/__init__.py", line 86, in <module>
    _libsuinput_path = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "_libsuinput" + sysconfig.get_config_var("SO")))
                                                                                     ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TypeError: can only concatenate str (not "NoneType") to str

[totaam]

Your installation of python3-uinput is broken. Remove it, it should not be installed anyway.
(not an xpra bug)