Mr. TMartien many many thanks for you,
Your solution works,
I will paste it here for anyone faceing same problem:
On some machines with Mojave, attempting to use the EndNote CWYW tools may result in returning to the EndNote library, or an Error message.
Mojave includes new Security & Privacy functions which can prevent EndNote from being able to correctly automate. To correctly set these options…
- Go into the Apple menu
- Click System Preferences
- Click Security & Privacy
- Click the Privacy tab (along the top)
- Click the Automation options, along the left.
- Here, make sure that both “Microsoft Word” and “EndNote X#” are both turned on.
With this automation turned off, the Cite While You Write functions will not work.