intl ICU version installed on your system (56.1) should match the ICU data bundled with Symfony (55.1

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intl ICU version installed on your system (56.1) should match the ICU data bundled with Symfony (55.1)
In most cases you should be fine, but please verify there is no inconsistencies between data provided by Symfony and the intl extension. See https://github.com/symfony/symfony/issues/15007 for an example of inconsistencies you might run into.

Configuration Checker

This script analyzes your system to check whether is ready to run Symfony applications.

RECOMMENDATIONS

To enhance your Symfony experience, it’s recommended that you fix the following:

  1. intl ICU version installed on your system (56.1) should match the ICU data bundled with Symfony (55.1)
    In most cases you should be fine, but please verify there is no inconsistencies between data provided by Symfony and the intl extension. See https://github.com/symfony/symfony/issues/15007 for an example of inconsistencies you might run into.
  2. a PHP accelerator should be installed
    Install and/or enable a PHP accelerator (highly recommended).

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