Unable to create folder, Workspace folder limit exceeds

Unable to create folder, Workspace folder limit exceeds

I am trialling the Standard Zoho Docs Account which I understand gives me the ability to create in excess of 100 folders within a Workspace. I have only created 11 folders but when I attempt to create a new folder - either a top-level folder or a sub-folder within one of the existing folders - I receive the error message "Unable to create folder, Workspace folder limit exceeds".