Unable to start a free trial

Dear support,

i tried, many times, to start a free trial, my objective is to test Storyline 360 before to buy a subscription. Below what I've done :

• Create an account here : https://www.articulate.com/360/trial/
• Activate my account by mail
• Access to the Articulate 360 dashboard : OK
• Download the Articulate 360 Apps : OK
• Lauching the app : Not OK, the message is : 

Could you please help me ? Very frustrating :s hope your assistance will help me :)

Regards

Frédéric