Scenario
- Navigate toLists > Accounting > Items
 - Click Edit
 - Click Web Store
 - Click Associated Images
 - Click an image
Error: “Permission Violation: You need a high level of the ‘Lists -> Documents and Files’ permission to access this page. Please contact your administrator.”
Note:Custom role has the following permissions:- Lists > Documents and Files: View or Edit access
 - Lists > Items: Full
 
 
Solution
- Login to Administrator Role
 - Navigate to Setup > Users/Roles > Manage Roles
 - Custom Role: Click Edit
 - Click Permissions
 - Click Lists
 - Permission:
Note: For every required field use the drop-down menu to select it and once adjusted click Add if needed.- Select Website (External) publisher
Note: Set the access Level as desired. 
 - Select Website (External) publisher
 - Click Add
 - Click Save