Error in server application '/key4register'

An error occured Your session has expired
2024-05-15 14:13:38 - 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/9211/J2-Pre0153-Bourrain Jean-Luc.pdf