run a php file or access an html page on my AWS - what is the URL

Not sure this is the place to ask this question and not sure it is not as stupid as it gets ....

Just installed the TK LAMP on an EC2 instance

I have uploaded a php file to a new folder I created with the file manager under 'root'.

I can't figure what is the URL I am to use to run the file from my web browser.

I can access the file from the command line but not display it in the browser.

I keep getting an error message 

The requested URL /myfolder/file.php was not found on this server.

The file is at /myfolder/file.php

I tried using 

https://xx.xx.xxx.xx:12321/myfolder/file.php

https://xx.xx.xxx.xx/myfolder/file.php

xx.xx.xxx.xx:12321/myfolder/file.php

xx.xx.xxx.xx/myfolder/file.php

What should I do to run the file ?

Thnaks

Erel