We have contacted Thomson Reuters technical support.
In the meantime, if you wish to add a citation from an EBSCO database to your Endnote Online library you can do so manually. See steps below:
1. When in your Endnote Online account go to the Collect tab and select New Reference:
2. Select your material type from the drop down menu e.g. Journal Article
3. Once you selected your material type double click the fields to enter your data and hit Save