lizzard0629,
It sounds like the WP plugin installer doesn’t have the permissions necessary to create a new folder in either the wp-content/upgrade/ or wp-content/plugins/ folder.
You can try the following:
1. Download a copy of the plugin from the main plugin page to your computer and un-zip it.
2. Connect to your web server using an FTP app such as Filezilla or Cyberduck (you can call your web host to ask how to get the FTP login info, if you’re not sure how)
3. Copy the plugin folder you downloaded into the wp-content/plugins/ folder on your web server
4. Activate the plugin on your website
Many FTP apps will also let you right-click on folders and change their permissions, so you may also want to make sure that these three folders all have their permissions set to 755:
wp-content/
wp-content/plugins
wp-content/upgrade
Permissions of 755 would look like this: https://cloudup.com/cVlk518Isf4
Hope that helps out!
