All users including the Administrator user, are unable to add external data in Strategy Web using folder browsing. However, all users can add external data through URLs.

Within Strategy Web
Error in importing the file. Please check the file being imported.
Details: undefined There was no file uploaded for this Task invocation.
<message>java.io.IOException: The system cannot find the path specified</message>
The message in the Strategy Web logs, “The system cannot find the path specified</message>” indicates that the Web Server cannot file the correct path to save the file from the Client machine to the Web Server machine.
Tomcat Location: C:\Program Files\Apache Software Foundation\Tomcat 8.5\temp

ASP Location: C:\Windows\Temp

KB423793