I just had the same issue. I recorded my application submission the second time. It does show the Pitch Deck file getting uploaded % in the status of my browser and then it takes me to the application page where I see a 'Edit' button instead of the Apply button. But the edit button does not take me to my application. Instead it presents a blank form.
I hope they can fix it before the last date. Happy to share the video if required.
Btw, I used fazle@wonture.com for my application submission, just in case it helps find the issue.
Thanks!