xtekky/gpt4free · error · MissingRequirementsError

No auth file found and nodriver is not available.

Error message

No auth file found and nodriver is not available.

What it means

Raised in LMArena.create_async_generator when no cached auth args exist AND the nodriver package is not installed, so there is no way to obtain a browser session. MissingRequirementsError means the environment lacks an optional dependency needed for this provider, not that authentication failed.

Source

Thrown at g4f/Provider/needs_auth/LMArena.py:573

        model: str,
        messages: Messages,
        conversation: JsonConversation = None,
        media: MediaListType = None,
        proxy: str = None,
        timeout: int = None,
        **kwargs,
    ) -> AsyncResult:
        prompt = get_last_user_message(messages)
        cache_file = cls.get_cache_file()
        args = cls.read_args(kwargs.get("lmarena_args", {}))
        _need_clear_cookies = False
        for _ in range(2):
            if args:
                pass
            elif has_nodriver:
                args = await cls.get_args_from_nodriver(proxy, _need_clear_cookies)
            else:
                raise MissingRequirementsError(
                    "No auth file found and nodriver is not available."
                )

            if not cls._models_loaded:
                # change to async
                await cls.get_models_async()

            def get_mode_id(_model):
                model_id = None
                # if not model:
                #     model = cls.default_model
                if _model in cls.model_aliases:
                    _model = cls.model_aliases[_model]
                if _model in cls.text_models:
                    model_id = cls.text_models[_model]
                elif _model in cls.image_models:
                    model_id = cls.image_models[_model]
                elif _model in cls.video_models:

View on GitHub (pinned to 973504e177)

Solutions

1. Install the optional dependency: pip install g4f[nodriver] (or pip install nodriver) and ensure a Chrome/Chromium browser is available
2. Alternatively supply credentials without a browser: pass lmarena_args kwarg or copy a valid args JSON to the cache file path returned by LMArena.get_cache_file()
3. Verify import success after install: python -c "from g4f.requests import has_nodriver; print(has_nodriver)" (or check g4f's nodriver import) before retrying

Example fix

# before
$ pip install g4f  # MissingRequirementsError at runtime

# after
$ pip install 'g4f[nodriver]'
$ python -c "import nodriver; print('ok')"

try:
    import nodriver
    has_nodriver = True
except ImportError:
    has_nodriver = False
from g4f.Provider.needs_auth.LMArena import LMArena
if not LMArena.read_args() and not has_nodriver:
    raise SystemExit('Install g4f[nodriver] or provide lmarena_args before using LMArena')

def lmarena_ready(args, has_nodriver: bool) -> bool:
    return bool(args) or has_nodriver

from g4f.errors import MissingRequirementsError
try:
    resp = await client.chat.completions.create(model='...', messages=msgs)
except MissingRequirementsError as e:
    if 'nodriver' in str(e):
        subprocess.run([sys.executable, '-m', 'pip', 'install', 'g4f[nodriver]'])
    raise

When it happens

Trigger: First-ever use of the LMArena provider with no args cache file, no lmarena_args kwarg, and has_nodriver == False because g4f was installed without the [nodriver] extra.

Common situations: Minimal pip install g4f without extras in Docker/CI; nodriver import failing at runtime (missing Chrome/Chromium binary) which makes has_nodriver false; a slim environment where the args cache was never seeded.

Related errors

• Failed to get download URL
• No authentication arguments found.
• Invalid response: {last_msg}
• Failed to obtain Turnstile token for DeepInfra request.
• No response

AI-assisted analysis of xtekky/gpt4free@973504e177 (2026-08-14). Data as JSON: /api/errors/7e1901c1935e5853. Report an issue: GitHub.