WordPress Speed Up Service | WordPress Website Maintenance Packages This site is in maintenance mode., by Purnendu Hi, you can see at the given link an error message is there, “This site is in maintenance mode”. I am using Multisite. My main site is working fine, but other sub sites are showing this kind of message. *Note- Not only on my custom login page, the message is also showing on login.php after deactivating Theme My Login plugin. This site is in maintenance mode.