xtekky/gpt4free · error · Exception

No valid access token obtained.

Error message

No valid access token obtained.

What it means

Raised by QwenContentGenerator.get_valid_token (qwenContentGenerator.py:36) when the shared token manager returned a credentials dict whose 'access_token' key is missing or empty. It means the Qwen OAuth credential store exists but is incomplete — typically because the device-code login never finished or the stored credentials were reset after a failed refresh.

Source

Thrown at g4f/Provider/qwen/qwenContentGenerator.py:36

    def get_current_endpoint(self, resource_url: Optional[str]) -> str:
        url = resource_url if resource_url else self.base_url
        if not url.startswith("http"):
            url = "https://" + url
        if not url.endswith("/v1"):
            url = url.rstrip("/") + "/v1"
        return url

    async def get_valid_token(self) -> Dict[str, str]:
        """
        Obtain a valid token and endpoint from shared token manager.
        """
        credentials = await self.shared_manager.getValidCredentials(self.qwen_client)
        token = credentials.get("access_token")
        resource_url = credentials.get("resource_url")
        endpoint = self.get_current_endpoint(resource_url)
        if not token:
            raise Exception("No valid access token obtained.")
        return {"token": token, "endpoint": endpoint}

View on GitHub (pinned to 973504e177)

Solutions

1. Complete the Qwen OAuth device-code login so valid credentials are written to the token store
2. Delete the stale credentials file and re-authenticate from scratch
3. Check for TokenManagerError logs just before this — the root cause is usually a failed refresh (REFRESH_FAILED / expired refresh token)
4. Ensure no other process holds the lock file while credentials are being refreshed

async def has_valid_qwen_access(manager, client) -> bool:
    creds = await manager.getValidCredentials(client)
    return bool(creds.get("access_token"))

def has_access_token(creds: dict) -> bool:
    return isinstance(creds, dict) and isinstance(creds.get("access_token"), str) and len(creds["access_token"]) > 0

try:
    auth = await generator.get_valid_token()
except Exception as exc:
    if "No valid access token" in str(exc):
        await run_qwen_device_login()  # re-authenticate
    else:
        raise

When it happens

Trigger: Calling any Qwen generation path that first awaits get_valid_token(); shared_manager.getValidCredentials(...) returns a dict without a truthy 'access_token' — e.g. empty credentials loaded from disk, or a refresh cycle that returned no token.

Common situations: First run before completing Qwen device authorization; credentials file partially written or hand-edited; refresh token expired and was wiped (see qwenOAuth2.py:177) leaving no access token; multiple processes racing on the credentials file.

Related errors

• GitHub Copilot OAuth not configured. Please run 'g4f auth gi
• NO_TOKEN
• Failed to read OAuth credentials from {path}: {e}
• No refresh token found in credentials.
• Token refresh failed: {text}

AI-assisted analysis of xtekky/gpt4free@973504e177 (2026-08-14). Data as JSON: /api/errors/9820c6fd36098f6f. Report an issue: GitHub.