You are unable to prepare your Submission because a "You cannot prepare a submission because you did not submit your Intent to Bid" message shows up:
You are unable to create a submission as you did not mark and submit your Intent to Bid before the specified deadline.
Bonfire Support doesn't have permissions to extend, edit, or manipulate any Project schedules on the buying organization's behalf. We therefore recommend reaching out to the Project Owner directly (see How do I contact the Project Owner?) as they are the only one with this decision making authority.