Sometimes we get some maintenance mode error in our website which says
When we update wordpress, it make temporary .maintenance file, reason for the above error is that, sometimes the .maintenance file is not removed properly after updates or when sometimes updates does not completed properly.
How to remove error:
1. Login to wp root directory though filezilla.
2. Locate .maintenance file.
3. Remove that file and refresh the website now
4. This will resolve error.
happy coding .. 🙂