The OTB Jaspersoft report 'Roadmap Timeline' results in "no matching records were found" on all Roadmaps in the non-production environment since the upgrade to 15.8.1. I was able to successfully run this report with correct data previously.
Here are the prerequisites to run the Advanced Reporting Roadmap Timeline Report. If your roadmap has at least one roadmap item spanning the selected fiscal period and still the report does not return data please select Swimlanes and Color By parameters, in certain cases this is required to see the report data.
Swimlanes and Color By: These parameters include three (3) default picklists and any custom picklists that your organization created for all roadmaps.