Issue
Java 7 is going end of life and Java 8 needs to be installed on customers workstations.
Cause
DFWorks version 2.11.xx and 3.0.0 to 3.0.63 does not support Java 7 in the browser.
Resolution
For Java 8 support the DFWorks software needs to be upgraded to version 3.0.64 or higher.
UPDATED: March 30, 2017