I would try installing the following version of the CWYW tools instead:
http://download.endnote.com/downloads/plugins/Cite%20While%20You%20Write.dmg
If that does not help then:
Please contact Technical Support directly
1-800-336-4474 option 4 then 1 or
https://support.clarivate.com/Endnote/s/technicalsupport?language=en_US