In the job configuration, in the "assigned Redmine project" settings, the name of the project must be specified. It is used for both the Redmine link at the left side of the screen and for the ticket metrics aggregation.

Unfortunately the link requires the internal name of the project while the aggregation requires the readable title of the project. If those two are different then there is always one of the two features not working.

I have a concrete case with which the project owner created the project with an internal name "product_next" while he has given the project the name "Product 11". The Redmine link is functional when setting the name to "product_next" but then the metrics aggregation won't work. (And the build job will fail btw.) The aggredation succeeds when specifying the name "Product 11" and the build succeeds. The Redmine link however is invalid.