Start AgentBrowser manually and confirm the main window is visible, then ask the AI to check http://127.0.0.1:10001/agent/v2/capabilities.
Identify the symptom before retrying.
Copy the error code and client version to speed up support.
查看Status栏中的真实错误信息并点击重启；再检查端口占用、防火墙或安全软件，并确认请求携带 api_token.txt 中的 X-AgentBrowser-Token。
Ask the AI to reread page/snapshot; do not reuse an expired elementId. Narrow the scope if the target is not unique.
Use the same Windows user and AgentBrowser data directory. Never delete WebView2 user data while the client is running.
Exit AgentBrowser completely before updating. End remaining background processes in Task Manager and retry.