Blank page on the web server

Hi, I came back here because I still couldn't solve this problem.
I reinstalled the codeigniter and reconfigured the settings, but I still get a blank page that can be viewed here:

I created a subdomain where I placed index.php. The files remain outside the public_html directory.
I am not receiving error logs. I configured Logger.php to show me all system messages:

PHP Code:

public $ threshold = 9; 


But I get just that:

Code:

INFO - 2020-04-21 16:39:58 -> Controller "App\Controllers\Home" loaded.

So, I think it must be some simple configuration I am not finding where to do it.