Hello,
Seems you are trying to integrate the Porto Admin Extension + Porto HTMl, right ? But inspecting your source code I saw you are nothing doing it. Just copying and pasting the HTML from Porto Admin to Porto HTML5 will not make the things work.
Please learn how to integrate the Porto Admin Extension with Porto HTML here:
IMPORTANT! How to integrate Porto Admin Extension on Porto
By including the Porto Admin extension files in the website, you will get the spinner working.
Please try that and let us know if you need further assistance.
Kind Regards,
Rodrigo.
If you are satisfied with Porto HTML and our support, please leave your comment and rating on ThemeForest downloads page. That helps us a lot: https://themeforest.net/downloads