datepicker displays textbox

datepicker displays textbox.

The error generated by browser console is as below

=======================================================

TypeError: jQuery(…).datepicker is not a function create:396

TypeError: jQuery(…).datepicker is not a function create:396

1160533137817 addons.update-checker WARN HTTP Request failed for an unknown reason

1160533138287 addons.repository WARN Search failed when repopulating cache

1160533138343 addons.update-checker WARN HTTP Request failed for an unknown reason

TypeError: jQuery(…).datepicker is not a function create:396

NS_ERROR_XPC_CANT_MODIFY_PROP_ON_WN: Cannot modify properties of a WrappedNative autocomplete.xml:901

Using //@ to indicate sourceMappingURL pragmas is deprecated. Use //# instead create:448

TypeError: jQuery(…).datepicker is not a function

=======================================================

I manually confugured yii2-jui (by copying it - no internet here)

created a folder \vendor\bower\jquery-ui (after some errors)

Other configurations are

=================begin======================================

in \vendor\yiisoft\extensions.php

array (

'name' => 'yiisoft/yii2-jui',


'version' => '2.0.2',


'alias' => 


array (


  '@yii/jui' => $vendorDir . '/yiisoft/yii2-jui',


),

),//end

====================end===================================

in views\registration\_form.php i use

use yii\helpers\Html;

use yii\widgets\ActiveForm;

use yii\jui\DatePicker;//kujahapa