Gpt 4o issues. Help required

My chatgpt app isn’t working properly. On the 4o model, if I tell it to generate a story with a simple prompt, say “Write the perspective of a school girl” like I’ve done before, it says “working” in the same way it might say “generating images” but it doesn’t generate anything, after a couple seconds it just says “I have generated a story from the perspective” or smth similar. If I stop it in the middle of generation, it is generating and I see the partial response I should’ve gotten but haven’t gotten any response. If I question it, it says “I’ve generated a story” yet I don’t have any response. The 4p mini response does work flawlessly and the other functions of the main 4o model like images and any other prompts work aswell. I’m a free user on the app, I don’t understand why it’s happening it been occuring all week