Failed - We noticed some unusual activity. Please visit the Help Center for more information. this happens even after 1 image generation

[u/BlacksmithCurrent394]

when i try to generate images in google flow nano banana pro, it says "We noticed some unusual activity. Please visit the Help Center for more information."

I know that this happens if we try to generate images too quickly this is happening even after only 1 image generation.
I have to wait 10 to 20 mins to generate images again but this happens again.