The project doesn't have any upload slots under the Requested Information section or looks as if it's missing some upload slots.
Because the Requested Information for each project differs and is set directly by the bid administrator, the cause for this differs from project to project. This may be because the Requested Information slots weren't set up properly by the purchaser, or because the purchaser doesn't want you to actually submit via Bonfire.
Read the tender documents carefully as usually submission instructions are enclosed there. If you require further clarification, we recommend reaching out to the project owner directly as they are the most qualified contact to answer.
For instructions on contacting the Buyer, see How do I contact the Project Owner?