I have added customer chat plugin code generated by Facebook wizard on my otherwise empty page.

<

script>
  window.fbAsyncInit = function() {
    FB.init({
      xfbml            : true,
      version          : 'v18.0'
    });
  };

In the plugin settings I have provided correct domain with https protocol. I also whitelisted that domain for the page. I have no country or age restrictions. The chat loads and seems to work correctly. But after a few minutes I am getting hundreds of errors in my browser console. I tried different browsers.

Access to XMLHttpRequest at 'https://www.facebook.com/plugins/customer_chat/SDK/?app_id=&attribution=biz_inbox&channel=https%3A%2F%2Fstaticxx.facebook.com%2Fx%2Fconnect%2Fxd_arbiter%2F%3Fversion%3D46%23cb%3Df3fe72899833244%26domain%3Dexample.com%26is_canvas%3Dfalse%26origin%3Dhttps%253A%252F%252Fexample.com%252Ff10aab675045618%26relation%3Dparent.parent&current_url=https%3A%2F%2Fexample.com%2Fchat&event_name=chat_plugin_sdk_facade_create&is_loaded_by_facade=true&loading_time=0&locale=en_US&log_id=f260da64-ca87-437c-a5bd-dfaa5803919b&page_id=<page_id>&request_time=1699479661195&sdk=joey&should_use_new_domain=false&suppress_http_code=1' from origin 'https://example.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
xfbml.customerchat.js:148 


GET https://www.facebook.com/plugins/customer_chat/SDK/?app_id=&attribution=biz_inbox&channel=https%3A%2F%2Fstaticxx.facebook.com%2Fx%2Fconnect%2Fxd_arbiter%2F%3Fversion%3D46%23cb%3Df3fe72899833244%26domain%3Dexample.com%26is_canvas%3Dfalse%26origin%3Dhttps%253A%252F%252Fexample.com%252Ff10aab675045618%26relation%3Dparent.parent&current_url=https%3A%2F%2Fexample.com%2Fchat&event_name=chat_plugin_sdk_facade_create&is_loaded_by_facade=true&loading_time=0&locale=en_US&log_id=f260da64-ca87-437c-a5bd-dfaa5803919b&page_id=<page_id>&request_time=1699479661195&sdk=joey&should_use_new_domain=false&suppress_http_code=1 net::ERR_FAILED 400 (Bad Request)

I don't know what else I can do to troubleshoot this problem.