Comment 1 for bug 2065846

php8.1-pgsql is not installed, you need
apt install php8.1-pgsql
In the file configuration for apache2
you need to add
<IfModule mod_php8.c>
    php_value max_execution_time 300
    php_value memory_limit 128M
    php_value post_max_size 16M
    php_value upload_max_filesize 2M
    php_value max_input_time 300
    php_value always_populate_raw_post_data -1
    php_value date.timezone Europe/Paris
    # php_value date.timezone Europe/Riga
</IfModule>
and it works