Connexion with the QuadP800-Pro driver

Hello,
i have experienced several time a déconnexion with the QuadP800-Pro pilot while my Epson SC-P800 Series was connected. I have uninstalled / installed the QuadP800-Pro driver but the problem remains. Somebody have any solution to suggest? I am under Catalina (which is a disaster)…
Thank you for your help.
Ludovic