Tell everyone there's a problem. Immediately. Make sure they understand that "working harder" isn't going to fix it. Reset everything. Massively reduce the sco

Tell everyone there's a problem. Immediately. Make sure they understand that "working harder" isn't going to fix it. Reset everything. Massively reduce the scope of the project and make sure everyone knows that's what you're doing and to expect to see something being delivered soon, but that it will be a small and simple component intended to get something out there. Deliver the smallest useful thing you possibly can as quickly as you can, and show everyone, Once you've delivered a few parts get a bit of momentum, get everyone together and hash out a slightly bigger next step.