Install NagiosXI E: Package 'php-pdo' has no installation ca

[PJStaphorst]

Tried to install NagiosXI and got an error from the script:

Package php-pdo is a virtual package provided by:
php7.3-common 7.3.4-1+ubuntu18.04.1+deb.sury.org+3
php7.2-common 7.2.17-1+ubuntu18.04.1+deb.sury.org+3
php7.1-common 7.1.28-1+ubuntu18.04.1+deb.sury.org+3
php5.6-common 5.6.40-6+ubuntu18.04.1+deb.sury.org+3
php7.0-common 7.0.33-6+ubuntu18.04.1+deb.sury.org+3

E: Package 'php-pdo' has no installation candidate
RESULT=100

The system has the 4.4.3 Core operating

How can we solve this issue?

Kind regards, Peter Staphorst

[npolovenko]

Hello, @PJStaphorst. How are you installing XI and what tutorial are you using?
By default, XI comes with PHP 5.4, PHP 7.1 and 7.2 versions should work with proper modifications, but versions higher than 7.2 are not supported.
Also, if you already have Core installed on the server, you shouldn't install XI on the same instance.
We only support installations on clean systems with no other applications installed.