[+] Create courses prop. and pass it from app.vue

src/components/app/app.vue

@@ -4,7 +4,7 @@
         <navigation :courses="courses" v-on:navigation:select="onNavigate"></navigation>
 
         <div id="app-content">
-            <overall v-if="selectedTab === 'overall' && assignmentsReady"></overall>
+            <overall :courses="courses" v-if="selectedTab === 'overall' && assignmentsReady"></overall>
         </div>
     </div>
 </template>

src/pages/overall/overall.ts

@@ -1,10 +1,11 @@
-import {Component, Vue} from 'vue-property-decorator';
+import {Component, Prop, Vue} from 'vue-property-decorator';
 import GraphOverall from '@/pages/overall/graph-overall/graph-overall';
+import {Course} from '@/components/app/app';
 
 @Component({
     components: {GraphOverall}
 })
 export default class Overall extends Vue
 {
-
+    @Prop({required: true}) courses: any;
 }