Change dashboardPlugin location,

resources/assets/js/views/settings/categories.js

@@ -8,6 +8,8 @@ require('./../../bootstrap');
 
 import Vue from 'vue';
 
+import DashboardPlugin from './../../plugins/dashboard-plugin';
+
 import Global from './../../mixins/global';
 
 import Form from './../../plugins/form';
@@ -17,6 +19,9 @@ import {ColorPicker} from 'element-ui';
 
 Vue.use(ColorPicker);
 
+// plugin setup
+Vue.use(DashboardPlugin);
+
 const app = new Vue({
     el: '#app',