The Manage Module Reference option is another intended (along with Knowledge Manager Import) for knowledge-sharing among developers. You can install a module provided by other developers that have packaged their funcionalities for distribution.
The Manage Module Reference dialog allows you to:
- Look for external modules on servers (including your local machine).
- Install, Update, or Restore a module to the KB
- Get information about the module, such as its version, author, description, license, platforms available, etc.

The Install/Update process updates the Output window with relevant process status, warnings, and errors.
error: Error downloading module 'WebExtensionToolkit' from 'GeneXusMatrix' (internal error: 'Object reference not set to an instance of an object.').
Reason: GeneXus requires Maven 3.6.1 or higher for installing modules from a Nexus Modules Server.
Solution: You must update Maven.
When and how is the GeneXus module updated in a KB?