Template window is empty because of an exception

We don't have a repro scenario, but it seems under specific circumstances an issue happens in the package manager, preventing the template window from retrieving information about the learning samples.

Actual results: 
The template window is empty

Expected results: 
The template window contains all built-in VFX templates

Reproducible with versions: 
6000.0

Not reproducible with versions: 

Can't test with versions: 

Tested on (OS): 

Notes:

•  This issue was raised by a customer on our discussion forum here.