After upgrading from Experian Payments Gateway 1.2 or earlier, you cannot see the contents of the Files and Reports views.
Two new permissions, ViewImportedFiles and ViewAllReports, were added in version 1.2. These permissions allow users to see files or reports respectively. In pre 1.2 versions, because there were no permissions, all users could view files and reports.
Assign the ViewImportedFiles and ViewAllReports permissions to all users who need to view files and reports.