SAP UI5 Routing and Navigation in SplitScreen Application - sapui5

Question

I'm facing an issue with SAPUI5 SplitScreen Concept. I have one initial view on which there is a button that leads to a SplitScreen application. Until this point everything works fine.The issue is that there a two additional views (Master.view, Detail.view) that should be routed to the SplitView.
They simply aren't loaded to it and I can't solve the problem.
I have mentioned manifest.json above.
{
"_version": "1.12.0",
"sap.app": {
"id": "curvy.SplitApp",
"type": "application",
"i18n": "i18n/i18n.properties",
"applicationVersion": {
"version": "1.0.0"
},
"title": "{{appTitle}}",
"description": "{{appDescription}}",
"sourceTemplate": {
"id": "ui5template.basicSAPUI5ApplicationProject",
"version": "1.40.12"
}
},
"sap.ui": {
"technology": "UI5",
"icons": {
"icon": "",
"favIcon": "",
"phone": "",
"phone#2": "",
"tablet": "",
"tablet#2": ""
},
"deviceTypes": {
"desktop": true,
"tablet": true,
"phone": true
}
},
"sap.ui5": {
"flexEnabled": false,
"rootView": {
"viewName": "curvy.SplitApp.view.App",
"type": "XML",
"async": true,
"id": "App"
},
"dependencies": {
"minUI5Version": "1.65.6",
"libs": {
"sap.ui.layout": {},
"sap.ui.core": {},
"sap.m": {}
}
},
"contentDensities": {
"compact": true,
"cozy": true
},
"models": {
"i18n": {
"type": "sap.ui.model.resource.ResourceModel",
"settings": {
"bundleName": "curvy.SplitApp.i18n.i18n"
}
}
},
"resources": {
"css": [{
"uri": "css/style.css"
}]
},
"routing": {
"config": {
"routerClass": "sap.m.routing.Router",
"viewType": "XML",
"async": true,
"viewPath": "curvy.SplitApp.view",
"controlAggregation": "pages",
"controlId": "app",
"clearControlAggregation": false
},
"routes": [{
"name": "RouteApp",
"pattern": "RouteApp",
"target": ["TargetApp"]
}, {
"name": "SplitView",
"pattern": "SplitApp",
"view":"SplitView",
"controlId": "App",
"target": ["SplitView"],
"subroutes": [{
"pattern": "Route_Master",
"name": "Master",
"view": "Master",
"targetAggregation": "masterPages",
"targetControl": "splitapp",
"target": ["Master"],
"subroutes": [{
"pattern": "Route_Detail",
"name": "Detail",
"view": "Detail",
"targetAggregation": "detailPages",
"target": ["Detail"]
}]
}]
}],
"targets": {
"TargetApp": {
"viewType": "XML",
"transition": "slide",
"clearControlAggregation": false,
"viewId": "App",
"viewName": "App"
},
"SplitView": {
"viewType": "XML",
"viewName": "SplitView"
},
"Master": {
"viewType": "XML",
"viewName": "Master",
"controlId": "splitapp"
},
"Detail": {
"viewType": "XML",
"viewName": "Detail",
"controlId": "splitapp"
}
}
}
}
}