The live platform is not yet active. It will be activated before the Conference (3-4-5 June, 2021).
Through the live platform, you will be able to follow the conference and present your abstract/paper. Before you can use the live platform, you will need to enter the pre-conference tool to create an account, submit your abstract/paper (facultative) and register to the conference.
Check the How to participate page to learn more about participating in the conference (attending, presenting, registering).