Multiple Subfolders on Export?

Hi all, quick question about exporting. Since upgrading to Resolve 14, it seems like I can no longer export with multiple levels of subfolders like I could in 12.
Before, in the "File Subfolder" dialog box on the Render Settings/File page, I used to be able to enter multiple names or tokens separated by slashes...eg "[File Name]/[Timeline Index]". However, when I do that now I get the error "Invalid character in suffix" because of the slashes. How would I go about fixing this?
Any and all help is greatly appreciated. Thanks!
Before, in the "File Subfolder" dialog box on the Render Settings/File page, I used to be able to enter multiple names or tokens separated by slashes...eg "[File Name]/[Timeline Index]". However, when I do that now I get the error "Invalid character in suffix" because of the slashes. How would I go about fixing this?
Any and all help is greatly appreciated. Thanks!