We are trying to use the Sitefinity 4 Products module that comes as an example in their SDK as a foundation for a couple custom content types we are creating.
When we use Products module example, we can see it created 2 new entries under the widget template to create custom widget templates. However, when we try to create the template, it will not show up in the list of available widget templates.
What is missing that is preventing the widget template we are creating from showing up on the list for editing. The widget template we create doesn't show up under All Templates nor my Templates.
I encountered this issue before, it turned out that my templates were set with a Build Action of "Content" instead of "Embedded Resource".
hope this is helpful!