When attempting to copy Tasks from Template nothing is being copied over. The error below gets generated in the app-ca.log file.
ERROR 2020-11-19 14:16:47,312 [http-nio-8082-exec-107] view.ViewL10nSAXHandler (session:odf.filterStateChange) Could not locate vxsl file '' in component odf
The issue was caused by one of the existing tasks in the Project that were trying to copy tasks into.
The Task may have been corrupted in the target Project.
Release : 15.8.1
Component : CA PPM APPLICATION
After deleting tasks, 'Copy Tasks From Template' worked as expected.