After preparing a maven mirro repository for offline use following the instruction here [1] and using the "rhdm-7.10.0-offliner.zip", some of the libraries were not included in the "rhdm-7.10.0-offliner.zip" such as the "maven-reporting-exec-1.1.jar".

[1] https://access.redhat.com/documentation/en-us/red_hat_process_automation_manager/7.10/html/deploying_red_hat_process_automation_manager_on_red_hat_openshift_container_platform/dm-openshift-prepare-con_openshift-operator#offline-repo-proc_openshift-operator