Error in server application '/key4register'

An error occured Your session has expired
2024-05-15 22:10:10 - Server - DNS secure.key4events.com - Register Version 2.48.28
Url reached : https://secure.key4events.com/key4register/UserControl/WebSite/schedule.aspx?e=339&dl=files/presentations/9253/CP2-Pre0269-Bourrain Jean-Luc.pdf