I am trying to install Magento 2.2.2 via a demo directory and getting Error 503
While Magento 2.2.1 is installing fine on the same directory.
The Link www.domain.com/demo is showing Error 503 on Magento 2.2.2
While the link www.domain.com/demo1 is showing installation screen on Magento 2.2.1
Please help me, I want to install Magento 2.2.2.
Is there any particular php modules to be installed for running Magento 2.2.2