How to setup drupal multisite in cpanel?

Question

I want to setup a drupal multisite but without success. I have followed this tutorials (and search in drupal answer):
- 2 minutes multisite
- 5 minutes multisite
- Setting up a multisite
I have tried with subdomains and with alias. My first question is when I create the alias or subdomain in cPanel, should I create a redirec? Now, I've left it blank, but I'm not sure if I have to create a redirect.

I always get:

The website encountered an unexpected error. Please try again later.

or

CGI-Error. Sorry. The page you request is not available.

I don't know what else I could do. Could some one detail me the steps? Thanks.

Answer 1

I have found the problem. My settings.php file had redis configuration, and that was the problem. I found it because I added this line to settings.php file:

$config['system.logging']['error_level'] = 'verbose';