Application installation from APS catalog fails on Plesk server: The ‘mysqli’ extension was not found

Symptoms

Application installation from APS catalog fails:

Error: Unable to install the app because its installation requirements are not met. Contact your hosting provider to resolve this problem.
Requirements
PHP extension The 'mysqli' extension was not found

Cause

PHP handler selected for the domain does not have mysqli or mysqlnd extension enabled.

Resolution

1. Log into Plesk.

2. Find the PHP handler version which is used by the affected domain, e.g example.com, in Domains > example.com > PHP Settings:

   

3. Enable extensions both mysqli (for both Linux and Windows) and mysqlnd (for Linux only) extensions in Tools & Settings > PHP Settings > PHP version from step #2

   

   Note: If those extensions are missing, install them as described in the article.

4. Re-initiate the installation of the application.