How to compile and run application source files

Hello guys, I have a source code for the application as a buyer. How do I collect files and run the application, and does it work on my phone? And the second question, the application, how do I link it to the admin control panel on a site?

This is the link to the site from which you purchased the application with the application itself

The link to the item is not correct.

I am suggesting to check first the item documentation / help file. If you still have questions, you should ask the item/app author for help.

The author does not respond, and I am a beginner in this field. I contacted him in all ways and he did not respond