Every upload is checked before the model is built. If the check fails, the card shows Not accepted, the panel gives a reason, and your credits come back. This is different from a job that failed, see A job failed or looks stuck.
The upload looked like a sketch, drawing, render or screenshot. Clone builds an exact twin from photos, and One-shot can turn a sketch straight into a model. Click Try One-Shot sketch mode in the panel, it switches the bar for you.
