The model could not turn this request into a result. Your credits go back to your balance automatically.
You may also see:
"The model could not make this. Try rewording the prompt."
"The model returned no image. Try a different prompt."
"The model returned no images. Try a different prompt."
What to do
Reword the prompt: describe one clear subject, the setting and the light.
For edits, try a simpler change, or a different source image.
Try a different model or style.
For words inside the image, use the Typography model.
See the refund
Tap the Credits box at the bottom of the sidebar to open Plan & credits (on a phone, tap the menu button (≡) at the top right first). Under Credit history, a line starting "Refund:" shows the credits that came back.