Following your solution, I still get the same error, now even on new projects/songs. The only way around it is to use the Chat Prompt, but this changes all of the arrangement, unless I provide a complete prompt all over, not to mention the use of credit points.
Could you share the project link with me so I can take a closer look? The male/female control is working properly in our internal tests, so if it’s not functioning on your side, I’ll make sure we compensate the credits used for those tries. No rush — just send me the link when you have a moment, and I’ll help you figure it out.
Currently, I can’t remember which 2 projects failed, and I had to use the chat section to edit the lyrics and generate. But if it happens next time, I’ll make a note and forward you the project and song details.