array(1) {
  ["session_id"]=>
  array(1) {
    [0]=>
    string(27) "Session ID cannot be blank."
  }
}
<pre>An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/services/CartService.php on line 63. in /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Response.php:369
Stack trace:
#0 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Response.php(342): yii\web\Response-&gt;sendHeaders()
#1 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/ErrorHandler.php(136): yii\web\Response-&gt;send()
#2 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/ErrorHandler.php(152): yii\web\ErrorHandler-&gt;renderException(Object(yii\base\ErrorException))
#3 [internal function]: yii\base\ErrorHandler-&gt;handleException(Object(yii\base\ErrorException))
#4 {main}
Previous exception:
yii\base\ErrorException: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent in /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Session.php:421
Stack trace:
#0 [internal function]: yii\base\ErrorHandler-&gt;handleError(2, &#039;session_set_coo...&#039;, &#039;/home/betelso1/...&#039;, 421)
#1 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Session.php(421): session_set_cookie_params(Array)
#2 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Session.php(149): yii\web\Session-&gt;setCookieParamsInternal()
#3 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Session.php(701): yii\web\Session-&gt;open()
#4 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Session.php(793): yii\web\Session-&gt;get(&#039;__flash&#039;, Array)
#5 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Session.php(960): yii\web\Session-&gt;getFlash(&#039;success&#039;)
#6 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/hail812/yii2-adminlte3/src/views/layouts/main.php(212): yii\web\Session-&gt;hasFlash(&#039;success&#039;)
#7 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/View.php(348): require(&#039;/home/betelso1/...&#039;)
#8 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/View.php(258): yii\base\View-&gt;renderPhpFile(&#039;/home/betelso1/...&#039;, Array)
#9 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/Controller.php(428): yii\base\View-&gt;renderFile(&#039;/home/betelso1/...&#039;, Array, Object(app\controllers\CartController))
#10 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/Controller.php(414): yii\base\Controller-&gt;renderContent(&#039;\n&lt;div class=&quot;co...&#039;)
#11 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/controllers/CartController.php(77): yii\base\Controller-&gt;render(&#039;view&#039;, Array)
#12 [internal function]: app\controllers\CartController-&gt;actionView()
#13 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/InlineAction.php(60): call_user_func_array(Array, Array)
#14 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/Controller.php(184): yii\base\InlineAction-&gt;runWithParams(Array)
#15 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/Module.php(555): yii\base\Controller-&gt;runAction(&#039;view&#039;, Array)
#16 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module-&gt;runAction(&#039;cart/view&#039;, Array)
#17 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/vendor/yiisoft/yii2/base/Application.php(387): yii\web\Application-&gt;handleRequest(Object(yii\web\Request))
#18 /home/betelso1/swiftvibe-electronics.betelsoft-technologies.com/web/index.php(12): yii\base\Application-&gt;run()
#19 {main}</pre>