Cannot attach screenshot on a JIRA issue when SSO is enabled

Integrating JIRA with Crowd the "Attach Screenshot" on the "More Actions" menu of an issue, the user is able to attach a screenshot. Once you enable Single Sign On (SSO), the user is no longer able to attach screenshots to an issue. The screen appears normally, but after you click "Attach", the attachment is not shown on the "Manage Attachments" screen. Nothing appears on the atlassian-jira.log file.