"merousign" template activation
After activating the MerouSign module in the Modules / Applications list, you must also activate the "merousign" template added to the Shipments module (if not already done).
In the list of Modules / Applications, open the configuration page of the module Shipments.
In the list of document templates, look for the "merousign" template.
Turn it on.
Make a test by clicking on the "preview" icon.