Assistant cannot view processes in Modern mode

Hi, we use classic folder without problems with Orchestrator 2020.10. Now, we want to use modern folder. I have followed the steps to create a Attended Robot in modern mode : Managing Robots
But the Assistant onto the (standard) machine do not shows any processes. The UiPath Assistant version is 19.10.2. I’m sure that user has acces to the Modern Folder in which we have one process. The robot state in the Assistant is connected, licensed. Thanks for any idea.

Sorry but i find the solution just after my question. I have to upgrade the robot machine to UiPath Assistant 2020.10 to solve the problem.