我正在尝试开发一个Chrome扩展，我的manifest.json是：

{
  "name" : "Extension",
  "version" : "2.2",
  "description" : "Web collaboration chrome extension",
  "permissions": ["tabs", "activeTab"],
  "browser_action": {
     "default_icon": "logo.png"
  },
  "icons": {
    "128": "icon128.png"
  },
  "content_scripts": [{
     "matches": ["*://*/*"],
     "run_at": "document_idle",
     "match_about_blank": true,
     "all_frames": true,
     "js": ["content.js", "addon.js"]
  }],
  "background": {
    "scripts": ["background.js"],
    "persistent": false
  },
  "content_security_policy": "script-src 'self'   https://expample.com/umd/example.min.js; object-src 'self'",
  "manifest_version": 2
}

background.js是：

chrome.tabs.query({active: true, currentWindow: true}, function (tabs) {
      let activeTab = tabs[0];
      chrome.tabs.sendMessage(activeTab.id, {"message": "request", "payload":    preferences}, function(response) {
        if (!chrome.runtime.lastError) {
          console.log('response', response);
        }else{
          console.log(chrome.runtime.lastError);
        }
      });
    });

content.js是：

chrome.runtime.onMessage.addListener(
                  function(request, sender, sendResponse) {
                     if(request.message === "request") console.log('response received', request.payload)
                     sendResponse({status: "done"});
                  return true;
                  }
               )

Chrome Inspector出现错误：chrome.runtime.lastError {message：'无法建立连接。接收端不存在。'}。
需要帮助吗