"Canceled by the system" All the time in Comfyui

I made a workflow today and tested it on another site as well, and it’s working properly. I also tested the same workflow here in Seaart comfyui, and it only worked once. After that, every single time I hit generate, the system cancels it in a split second. I thought the problem was that I was using the free creation mode, but even after turning it off and trying to generate expending credits, it always cancels out. Idk why it happens; the workflow isn’t even complex. I’ve run more complex workflows in the past. They worked even in free creation mode. Please fix this issue if it’s an error from your side. If you think it’s my fault, let me know what it is.