When installing plugins or updating a WordPress site, be patient. If you interrupt the process, your site may be stuck in maintenance mode. If this happens, all that anyone trying to access your site will see is a message stating that maintenance is underway and to try back again later. To get out of this mode, you will need to delete a file that WordPress deposited in the public_html folder of your site. The file is named .maintenance.php. Notice that it starts with a dot (period). This means the file is for the exclusive use of the server. When looking at the contents of the folder using FTP software, ensure that the software can see hidden files otherwise the file will be invisible. Select .maintenance and delete it. Your site should now function properly. You will probably need to do the update or install plugins again. This time don’t navigate away from the webpage until WordPress lets you know that the process is complete.