Yiimp: CDbException: CDbConnection failed to open the DB connection. error when hasGetInfo is set to false

ups :( is a common error if you are using by example php8

if you look at your Dashboard you will see the main is in red color that means normally a PHP problem with MySQL or a problem with Mysql

php -v to see your version

You need to be sure you have php7.2 or php7.3 and teh PDO extension

Make sure you setup this:

 apt-get install software-properties-common
    sudo add-apt-repository -y ppa:ondrej/php
    sudo apt-get update

Them use php7.3 or 7.2

update-alternatives --set php /usr/bin/php7.3

again check your server and see is 7.3

php -v

Check your nginx domain config and make sure php-fpm is version 7.3 or 7.2

them if you reboot . Walla all works

Try to use an install scrypt with the last sources version of https://github.com/Kudaraidee/yiimp.git

Updates scripts with Kuraide sources are available in Github up Coleganet but actually are using Docker Container and more advance setup