After Grafana is installed, the web opens and reports an error

After Grafana is installed, the web opens with the following error:

If you're seeing this Grafana has failed to load its application files

1. This could be caused by your reverse proxy settings.
2. If you host grafana under subpath make sure your grafana.ini root_url setting includes subpath. If not using a reverse proxy make sure to set serve_from_sub_path to true.
3. If you have a local dev build make sure you build frontend using: yarn start, yarn start:hot, or yarn build
4. Sometimes restarting grafana-server can help
5. Check if you are using a non-supported browser. For more information, refer to the list of supported browsers.
   

There are two solutions:

1. Switch to a browser supported by the official website

2. Modify /opt/module/grafana-9.0.5/conf/defaults.ini

Set allow_embedding to true (set to true if you want to allow browsers to render Grafana in a , , or . default is false.)