When I was installing SwitchBoard today, an error occurred halfway through the installation. Then during the installation, the bat file flashed.
The current solution is as follows:
Delete Python.exe and Pythonw..exe in Epic Games\UE_5.0\Engine\Extras\ThirdPartyNotUE\SwitchboardThirdParty\Python\Scripts so that the bat file cannot detect python.exe, and then reinitialize it.
The reason is that the bat file detects whether pythonw.exe exists during installation. If it exists, setup.py will not be executed, so the package will not be installed, so executing bat will pass by in a flash.
If ValueError: check_hostname requires server_hostname appears during the installation process, because a VPN or some proxy VPN is opened during the installation process, just turn it off.