There are times when you want to prevent the world from seeing your website. One reason might be that you are in the process of designing and developing and don’t want to share your progress with the world, since it might not be ready for all eyes. Another reason might be that you only want registered users to have access to view your content. The following plugin can help restrict access to your WordPress website:
Restrict Site Access – https://wordpress.org/plugins/restricted-site-access/
You may need to purge cache on Deflect and eQPress after maintenance page was enabled or after it was disabled.