{"record":{"id":"8938807349a36a67","repo":"microsoft/autogen","slug":"no-such-element","errorCode":null,"errorMessage":"No such element.","messagePattern":"No such element\\.","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"python/packages/autogen-ext/src/autogen_ext/agents/web_surfer/playwright_controller.py","lineNumber":362,"sourceCode":"        \"\"\"\n        Click the element with the given identifier.\n\n        Args:\n            page (Page): The Playwright page object.\n            identifier (str): The element identifier.\n\n        Returns:\n            Page | None: The new page if a new page is opened, otherwise None.\n        \"\"\"\n        new_page: Page | None = None\n        assert page is not None\n        target = page.locator(f\"[__elementId='{identifier}']\")\n\n        # See if it exists\n        try:\n            await target.wait_for(timeout=5000)\n        except TimeoutError:\n            raise ValueError(\"No such element.\") from None\n\n        # Click it\n        await target.scroll_into_view_if_needed()\n        await asyncio.sleep(0.3)\n\n        box = cast(Dict[str, Union[int, float]], await target.bounding_box())\n\n        if self.animate_actions:\n            await self.add_cursor_box(page, identifier)\n            # Move cursor to the box slowly\n            start_x, start_y = self.last_cursor_position\n            end_x, end_y = box[\"x\"] + box[\"width\"] / 2, box[\"y\"] + box[\"height\"] / 2\n            await self.gradual_cursor_animation(page, start_x, start_y, end_x, end_y)\n            await asyncio.sleep(0.1)\n\n            try:\n                # Give it a chance to open a new page\n                async with page.expect_event(\"popup\", timeout=1000) as page_info:  # type: ignore","sourceCodeStart":344,"sourceCodeEnd":380,"githubUrl":"https://github.com/microsoft/autogen/blob/027ecf0a379bcc1d09956d46d12d44a3ad9cee14/python/packages/autogen-ext/src/autogen_ext/agents/web_surfer/playwright_controller.py#L344-L380","documentation":"PlaywrightController.click_id() locates the element by its injected __elementId attribute and waits up to 5000 ms for it to appear; on timeout it raises ValueError('No such element.'). Element ids are assigned when the page snapshot was taken, so this almost always means the DOM changed between the LLM seeing the page and clicking — navigation, re-render, SPA update, or an iframe/context switch invalidated the id.","triggerScenarios":"click_id(page, target_id) where target_id came from an older snapshot: after page navigation, dynamic content replaced the node, the element was inside a shadow DOM/iframe not re-tagged, or the id string itself is malformed (e.g. 'None' from str(args.get('target_id')) on a missing arg).","commonSituations":"Clicking on reactive sites (React/Vue re-renders), popups/dialogs covering content, slow-loading pages where the snapshot was taken too early, agents reusing ids across steps.","solutions":["Re-observe the page (take a new snapshot / call the observe step) and use a fresh target_id","Catch the ValueError and retry the click after the page settles (wait_for_load_state + sleep)","Ensure the model always requests fresh page state before interacting after any navigation","Pass correct target_id values; validate the id exists in the current rects before clicking"],"exampleFix":"// before\nawait controller.click_id(page, old_target_id)  # stale after navigation\n\n// after\ntry:\n    await controller.click_id(page, target_id)\nexcept ValueError:\n    rects = await surfer._get_visual_rects(...)  # refresh state\n    target_id = pick_new_id(rects)\n    await controller.click_id(page, target_id)","handlingStrategy":"retry","validationCode":"async def target_exists(page, identifier: str) -> bool:\n    locator = page.locator(f\"[__elementId='{identifier}']\")\n    try:\n        await locator.wait_for(timeout=1000)\n        return True\n    except TimeoutError:\n        return False","typeGuard":null,"tryCatchPattern":"try:\n    new_page = await controller.click_id(page, target_id)\nexcept ValueError as e:\n    if 'No such element' in str(e):\n        await page.wait_for_load_state()\n        # re-snapshot page, pick a fresh target_id, then retry once\n        raise StaleElementException('re-observe page before clicking') from e\n    raise","preventionTips":["Re-observe the page after every navigation before clicking","Never reuse target ids across steps on dynamic sites","Build one generic retry-with-fresh-snapshot wrapper for all *_id controller calls"],"tags":["playwright","web-surfer","dom","stale-state","timeout"],"backgroundTag":null,"analyzedSha":"027ecf0a379bcc1d09956d46d12d44a3ad9cee14","analyzedAt":"2026-08-15T03:38:00.719Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}