First, verify if the file indeed does not exist. Navigate to your Steam installation directory and look for the steam-api.ini file.
Ensure the script can read the file:
It's a configuration file containing your Steam Web API key and sometimes other settings (e.g., language, game ID). The format is usually: missing steam-api.ini file
[SteamAPI]
key = YOUR_STEAM_API_KEY_HERE
You need a valid key from: https://steamcommunity.com/dev/apikey First, verify if the file indeed does not exist