Update Plesk PHP against a newer version of libicu package
Plesk PHP handlers should have the latest libicu package version for better compatibility with newer versions of web apps such as Magento
Paul Grant commented
Please see your internal ticket ID : 218569
tl;dr : Your Centos 7 builds of PHP build against the version of libicu supplied by RHEL7 (50.2) but this lacks features/bugfixes that are in the latest builds of libicu (62.x) as supplied by Remi .
This is manifesting as an issue for one of our customers on the latest build of Magento (2.3.4).
As the module in question is intl, I can't simply rebuild it with pecl, I'd have to rebuild the entirety of the PHP version(s) in question.