{"record":{"id":"3af6647e0dcf83f6","repo":"xtekky/gpt4free","slug":"invalid-response-last-msg-3af664","errorCode":null,"errorMessage":"Invalid response: {last_msg}","messagePattern":"Invalid response: (.+?)","errorType":"exception","errorClass":"MissingAuthError","httpStatus":null,"severity":"error","filePath":"g4f/Provider/CopilotSession.py","lineNumber":231,"sourceCode":"                mime_type = is_accepted_format(\n                    base64.b64decode(msg.get(\"content\")[:12])\n                )\n                yield ImagePreview(\n                    f\"data:{mime_type};base64,{msg.get('content')}\", image_prompt\n                )\n            elif msg.get(\"event\") == \"chainOfThought\":\n                yield Reasoning(msg.get(\"text\"))\n            elif msg.get(\"event\") == \"error\":\n                raise RuntimeError(f\"Error: {msg}\")\n            elif msg.get(\"event\") not in [\n                \"received\",\n                \"startMessage\",\n                \"partCompleted\",\n                \"connected\",\n            ]:\n                debug.log(f\"Copilot Message: {msg_txt[:100]}...\")\n        if not done:\n            raise MissingAuthError(f\"Invalid response: {last_msg}\")\n        if sources:\n            yield Sources(sources.values())\n\n\nif has_nodriver:\n\n    async def click_trunstile(\n        page: nodriver.Tab, element='document.getElementById(\"cf-turnstile\")'\n    ):\n        for _ in range(3):\n            size = None\n            for idx in range(15):\n                size = await page.js_dumps(f\"{element}?.getBoundingClientRect()||{{}}\")\n                debug.log(f\"Found size: {size.get('x'), size.get('y')}\")\n                if \"x\" not in size:\n                    break\n                await page.flash_point(size.get(\"x\") + idx * 3, size.get(\"y\") + idx * 3)\n                await page.mouse_click(size.get(\"x\") + idx * 3, size.get(\"y\") + idx * 3)","sourceCodeStart":213,"sourceCodeEnd":249,"githubUrl":"https://github.com/xtekky/gpt4free/blob/973504e1770928ed5fb82f43da528f441ad9ddc3/g4f/Provider/CopilotSession.py#L213-L249","documentation":"CopilotSession finished reading the WebSocket event stream without receiving the completion signal, so 'done' stayed False. MissingAuthError is raised with the last raw message, reflecting that truncated Copilot streams are most often caused by session/auth rejection rather than payload problems.","triggerScenarios":"Stream ended after handshake/start events with no content events; websocket closed mid-turn; completion event renamed so it is not recognized; session invalidated server-side mid-conversation.","commonSituations":"Expired cookies/token mid-session; new event types from Microsoft breaking completion detection; rate limiting ending streams early; network drop.","solutions":["Inspect last_msg from the exception to see the final event received","Refresh auth and retry with a new conversation","If a renamed completion event is visible in logs, update the done-detection logic in the provider"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":null,"typeGuard":null,"tryCatchPattern":"from g4f.errors import MissingAuthError\n\ntry:\n    async for chunk in CopilotSession.create_async_generator(model, messages):\n        yield chunk\nexcept MissingAuthError as e:\n    if 'Invalid response' in str(e):\n        async for chunk in AlternativeProvider.create_async_generator(model, messages):\n            yield chunk\n    else:\n        raise","preventionTips":["Log last_msg to distinguish auth truncation from unknown-event drift","Refresh credentials and start a new conversation on this error","Maintain a fallback provider chain for Copilot outages"],"tags":["websocket","streaming","auth","copilot"],"backgroundTag":null,"analyzedSha":"973504e1770928ed5fb82f43da528f441ad9ddc3","analyzedAt":"2026-08-14T23:45:32.408Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}