Faq page may help you, or contact support.
Login to your admin dashboard. Go to Users > Add New. Fill in required fields. Press “Add New User”. Send login and password to the person you want to be logged in.
Try to check in different browser. If you a logged as wordpress user you see website in normal mode.
There are no restrictions. Your logo will always appear as it is, in the center of the page.
This plugin is designed to put the whole site under one splash.
The site will not be visible to search engines.
You need to check permissions on folder and set 755.