I bought Creative CLoud Pro which includes Adobe FIrefly. BUt when I try to generate voice, there is error message asking for credits, or showing your character exceeds limits. But out of 5000 characters I am using only 4700

Firefly voice generation is not generating voice even though I am creaative cloud pro user. It is asking for extra credits which I have already. Then showing that character limit has reached. But I am using only 4700 out of 5000 characters