While installing Joomla on OpenShift message was shown that
"PHP mcrypt should be installed or some features of Joomla might not work properly".
Now the Joomla sample website opens sometimes and sometimes doesn't but shows the message:
"Application is not available. The application is currently not serving requests at this endpoint. It may not have been started or is still starting.".
Is it due to PHP mcrypt. I also tried using PHP 5.5 and 5.6. How can I solve this problem and install PHP mcrypt? Also the Joomla setup wizard was not rendering properly. But I installed it anyways.