Hi,
Try to add this code in the extended app's Component.js:
(function() {
jQuery.sap.registerModulePath("sap.cus.crm.lib.reuse", "/sap/bc/ui5_ui5/sap/crm_lib_reuse/sap/cus/crm/lib/reuse");
}());
Right between the "jQuery.sap.declare.." and the "sap.ui.component.load..."
Regards,
Michal.