Image shows on home page, but not on article page I am using Open Outreach. When I create an article the image I uploaded appears on the home page, but does not appear when I click the link for that article. 

From what I've read, it looks like it has something to do with Configuration/Media/File System. My public file system path is set as sites/openoutreach-7-x-1-19.dd/files. Do I need to change this? If so, what do I change it to?

Log message:

Type    page not found
Date    Thursday, June 4, 2015 - 9:43am
User    admin
Location    http://openoutreach-7-x-1-19.dd:8083/sites/openoutreach-7-x-1-19.dd/files/styles/medium_large/public/Portulaca%20grandiflora.jpg?itok=OP-6w24x
Referrer    http://openoutreach-7-x-1-19.dd:8083/article/june-3-2015-newsletter
Message sites/openoutreach-7-x-1-19.dd/files/styles/medium_large/public/Portulaca grandiflora.jpg
Severity    warning
Hostname    127.0.0.1

There is no medium_large folder in my styles folder. Do I need to create one?

Thanks!
When contrib images are missing in drupal the cause more often than not is that you have permissions problems with regards to your filesystem.

Make sure that your webserver can write to your files and files/styles directories.

If permissions are ok then drupal will create your medium_large directory and subdirectories.

Check the drupal setup documentation here (see the paragraph "Create the files directory").
As mentioned there make sure that you have write permissions on your sites/default/files directory.