Hi.
Can you please follow that instructions? Does any of them helps you?
https://support.displaylink.com/know...lay-is-working
https://support.displaylink.com/know...-functionality
If you still have issues please gather diagnostic information and attach them in the post.
Please use our support tool:
https://www.displaylink.com/downloads/file?d=66
I would be grateful for output of terminal command:
sudo kextstat | grep DisplayLink