Hello, first thanks for your purchase.
Please follow the instructions on this FAQ topic:
IMPORTANT! How to use a skin
* In the link above you will see the explanation to generate the skin code trough our preview link. I saw you are using the index-corporate-3.html. On this case the preview URL you should use to generate the skin is:
https://www.okler.net/previews/porto/8.1.0/index-corporate-3.html
* Also, in the corporate-3 demo you should add the generated code in the “css/skins/skin-corporate-3.css” instead of “css/skins/default.css”.
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