element 2023 acheté pour remplacer 2021 mais impossible à installer code erreur 50 et 64

A similar problem is found with a different Adobe program in this discussion. 

The best suggestion is to contact Elements support. You can start a chat session by clicking on the blue Contact Us button under the Help & Support menu at Adobe.com. Or you can contact Support by telephone using the numbers listed here: https://helpx.adobe.com/contact/phone.html. Hours of operation outside of the United States are limited. See the phone link for details.