This means the generation costs more credits than your balance. Nothing was charged.
You may also see:
"This voice-over needs [number] credits and you do not have enough left."
"This episode needs [number] credits (1 a minute) and you do not have enough left."
"This episode needs [number] credits and you have [number]. Top up on the Plan page."
A red cost line under the button, such as "Uses 8 credits · 2 left · Get more". The button stays greyed out until you have enough.
What to do
Choose a cheaper option: fewer images, the Fast model (1 credit), a Quick edit (1 credit), or a shorter video.
Tap Get more, or 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 Top up, tap Buy next to 100 credits (₦1,000) or 300 credits (₦2,700). Top-up credits never reset.
Or buy or extend a pass for more credits: Week, Creator or Pro.
On Free, wait for your credits to reset. Plan & credits shows the date next to Resets.
Check your balance
The Credits box at the bottom of the sidebar shows your plan credits, with any top-up credits as a separate + figure.
The Studio page shows your total at the top, as "credits left".