Generate will not start
Uploads still going, a prompt too long, or an input the model does not take.
- The button says "Uploading…". It waits until every file you added is uploaded, so the video does not go out without it. Give it a moment.
- "…takes prompts up to N characters". The model you picked has a shorter prompt limit; the counter under the box turns red. Shorten the prompt or pick another model.
- "…takes a prompt and at most one starting image". MiniMax H3, LTX-2.5 and Wan 2.6 do not take reference video, audio, a last frame or characters. Remove them, or pick a Seedance model.
- "A first or last frame can't be combined with references, people, reference video or audio". The model takes either frames or references, not both. Turn the frame into a reference (say "Image 1 is the first frame" in the prompt), or remove the other attachments.
- "Nothing to upscale yet". Upscale only is on but no video has been added. Add one, or turn Upscale only off.
- A padlock, or a message that something needs a paid plan. That model, quality, length or input is not included on your plan; the message says which.