Upgrade 1.4.7 to 1.5.3-2018120800 composer.phar version error

    I have this error when I want upgrade from 1.4.7 to 1.5.3-2018120800

    System Debian 9.13 Up2Date

    I try with PHP 5.6 and PHP 7.1




    Code
    1. [ERROR] iMSCP::Composer::_getComposer: Couldn't get composer.phar version at /root/IMSCP/imscp-1.5.3-2018120800/engine/PerlLib/iMSCP/Composer.pm line 203.
    4. [ERROR] autoinstaller::Functions::install: An error occurred while performing installation steps


    Tank U!