Magento 2 Fatal Error when running composer:install
Clone fresh Magento 2 instance; 2.Run composer:install Fatal Error: PHP Fatal error: Uncaught Error: Undefined class constant 'PRE_COMMAND_RUN'
Clone fresh Magento 2 instance; 2.Run composer:install Fatal Error: PHP Fatal error: Uncaught Error: Undefined class constant 'PRE_COMMAND_RUN'