While trying to create a new Tritone image using Adobe Photoshop 23.4.1 (on an iMac with mac OS Monterey 12.4) After designating and adjusting the colours, I tried to click “OK” but I get this pop-up message (see attached). Even if I change the names of the colours used it will not accept them and allow me to move beyond this stage. Duotone still works though. Am I missing something? I've tried closing and restarting Photoshop but the tritone issue still won't allow me click "OK" and continue to save the image.