DuckDuckGo search seems broken

Bug description There is something strange going on with DuckDuckGo as a search engine. It seems to fail.

Environment information Ubuntu24.10

• System version:
• Python version: The one created with uv
• OpenManus version or branch: latest repo
• Installation method (e.g., pip install -r requirements.txt or pip install -e .): uv

Screenshots or logs

 python main.py
INFO     [browser_use] BrowserUse logging setup complete with level info
INFO     [root] Anonymized telemetry enabled. See https://docs.browser-use.com/development/telemetry for more information.
Enter your prompt: find me the best news today
2025-03-18 12:13:59.723 | WARNING  | __main__:main:15 - Processing your request...
2025-03-18 12:13:59.724 | INFO     | app.agent.base:run:139 - Executing step 1/20
2025-03-18 12:14:03.710 | INFO     | app.llm:update_token_count:236 - Token usage: Input=1664, Cumulative Input=1664
2025-03-18 12:14:03.710 | INFO     | app.agent.toolcall:think:77 - ✨ Manus's thoughts: 
2025-03-18 12:14:03.710 | INFO     | app.agent.toolcall:think:78 - ️ Manus selected 4 tools to use
2025-03-18 12:14:03.710 | INFO     | app.agent.toolcall:think:82 -  Tools being prepared: ['browser_use', 'browser_use', 'browser_use', 'browser_use']
2025-03-18 12:14:03.710 | INFO     | app.agent.toolcall:think:85 -  Tool arguments: {"action":"go_to_url","url":"https://www.google.com/search?q=latest+news"}
2025-03-18 12:14:03.711 | INFO     | app.agent.toolcall:execute_tool:177 -  Activating tool: 'browser_use'...
2025-03-18 12:14:05.071 | INFO     | app.agent.toolcall:act:147 -  Tool 'browser_use' completed its mission! Result: Observed output of cmd `browser_use` executed:
Error: Browser action 'go_to_url' failed: Page.goto: net::ERR_NETWORK_CHANGED at https://www.google.com/search?q=latest+news
Call log:
  - navigating to "https://www.google.com/search?q=latest+news", waiting until "load"

2025-03-18 12:14:05.071 | INFO     | app.agent.toolcall:execute_tool:177 -  Activating tool: 'browser_use'...
2025-03-18 12:14:05.096 | INFO     | app.agent.toolcall:act:147 -  Tool 'browser_use' completed its mission! Result: Observed output of cmd `browser_use` executed:
Error: Failed to extract content: Page.content: Unable to retrieve content because the page is navigating and changing the content.
2025-03-18 12:14:05.096 | INFO     | app.agent.toolcall:execute_tool:177 -  Activating tool: 'browser_use'...
/home/tcsenpai/OpenManus/app/tool/web_search.py:98: RuntimeWarning: coroutine 'DuckDuckGoSearchEngine.perform_search' was never awaited
  None, lambda: list(engine.perform_search(query, num_results=num_results))
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
Search engine 'duckduckgo' failed with error: RetryError[<Future at 0x701e3b0f05f0 state=finished raised TypeError>]