Jaspersoft and tomcat version to 8.5.57
Release : 15.8
Component : CA PPM APPLICATION
Jaspersoft 7.1 has not been tested with Tomcat version 8.5.57
Please see the below link clarity ppm 15.8 and Jaspersoft.
https://techdocs.broadcom.com/us/en/ca-enterprise-software/business-management/clarity-project-and-portfolio-management-ppm-on-premise/15-8/installing-and-upgrading/upgrade-clarity-ppm/upgrade-jaspersoft-and-migrate-advanced-reporting-content.html