I read the email carefully, and it wrote the deadline is 5th June, 23:59 CET, which means I can submit my work before this time, but at 5th June 3:00 a.m CET, the submission channel has been closed that I cannot submit any things of my work. And 2 hours ago, I also received an email that told me I only have one day to submit my work, but now it was closed. Please check the problem,and return me as soon as possible. I spent whole week to do the work. Please, open the channel.