While editing your trait taxonomy (creating folders), Audience Manager returns an error stating "Request cannot proceed. You are at or have exceeded limits for your organization for TRAIT_FOLDER_DEPTH resources. Your maximum is 5."
With the introduction of the 'Folder Traits' feature, a limit has been applied to the depth of the taxonomy folders where up to five subfolders can be created for trait management. The limit is necessary for cascading the folder trait realizations. This is a hard limit and cannot be increased.