Short answer: A generation can fail because of unsupported settings, model provider errors, upload issues, policy checks, network problems, or insufficient credits.
Steps
Check your credit balance.
Review the selected model and settings.
Remove unsupported references or upload formats.
Simplify the prompt and try again.
If the issue repeats, contact support with the generation time, model, and prompt summary.
Notes
Do not start many duplicate attempts if a provider appears unavailable.
A concise support ticket helps the team investigate faster.
Troubleshooting
Try a different model to check whether the issue is model-specific.
Try PNG or JPEG if a reference upload may be causing the failure.