Hi Nimmy Sukumaran,
I am using Captivate version 7 and I am having the same problem with ALL of the interactions; I cannot insert any interaction into my project without getting the "invalid widget" error.
Yes, I find all the widgets in this location:
Win location :- C:\Users\Public\Documents\Adobe\eLearning Assets\Interactions
When I try inserting the interaction through the 'Insert>Widget> select an interaction from the above location' it doesn't work.
Any help is appreciated