Redmine

Hi

This is my first message in the forum. I have been using Redmine for the past few months.

For the past couple of weeks I have been trying to integrate the Redmine and Jenkins
My requirement is see Jenkins build issues and other information from Redmine.

I downloaded RedMine Jenkins plugin https://www.redmine.org/plugins/t-ando_redmine_hudson and installed sucessfully.
I specified the Jenkins url page and followed other instructions.

But when I click connection, PLugin is generating ruby rails error.

The error message is undefined method `map' for nil:NilClass

What can be the reason for this error?