佬们，请问我在配置ccr启动后，对话会报错500 {“error”:{“message”:"Cannot read properties of undefined (reading ‘image’)，我看github上有issue提到这个问题时可能和router有关，修改了一下还是报错，是什么原因呀，配置如下： 
{
  "Providers": [
    {
      "PROXY_URL": "http://127.0.0.1:7890",
      "name": "b4u",
      "api_base_url": "https://b4u.qzz.io/v1/chat/completions",
      "api_key": "sk-",
      "models": [
        "claude-4.5-sonnet-think",
        "cl...