Why can't apache create folders/files?

Question

PHP

Vestacp is installed on the first VPS and php+apache was installed along with it. Apache is running from www-data

APACHE_RUN_USER 	www-data
APACHE_RUN_GROUP 	www-data

On the second vps hestiacp. Installed php+apache too. Also from www-data

APACHE_RUN_USER 	www-data
APACHE_RUN_GROUP 	www-data

The problem is that on the first vps, files/folders in the user's directory are created without problems, and on the second vps, Apache cannot create either a folder or a file.
PHP Warning: mkdir(): Permission denied
He can write to a file only when you put 777 rights.

Part of the config of the first vps

<IfModule mod_ruid2.c>
        RMode config
        RUidGid ankor1 ankor1 
        RGroups www-data
    </IfModule>
    <IfModule itk.c>
        AssignUserID ankor1 ankor1 
    </IfModule>

Part two

<IfModule mod_ruid2.c>
        RMode config
        RUidGid ankor2 ankor2 
        RGroups www-data
    </IfModule>
    <IfModule mpm_itk.c>
        AssignUserID ankor2 ankor2 
    </IfModule>

Where could be my mistake?

Answer 1

Everything turned out to be simple. The mpm_itk module was not installed.

# a2enmod mpm_itk
ERROR: Module mpm_itk does not exist!

Installation and activation

apt install libapache2-mpm-itk
a2enmod mpm_itk

Answer 2

You show configs, but you need to show a directory in which you do not create - who owns it, what permissions, who is in what groups and all that.