<pre>PHP Warning 'yii\base\ErrorException' with message 'Trying to access array offset on value of type null'
in /opt/app/frontend/panels/iops/views/summary.php:11
Stack trace:
#0 /opt/app/frontend/panels/iops/views/summary.php(11): yii\base\ErrorHandler->handleError(2, 'Trying to acces...', '/opt/app/fronte...', 11)
#1 /opt/app/vendor/yiisoft/yii2/base/View.php(348): require('/opt/app/fronte...')
#2 /opt/app/vendor/yiisoft/yii2/base/View.php(258): yii\base\View->renderPhpFile('/opt/app/fronte...', Array)
#3 /opt/app/vendor/yiisoft/yii2/base/View.php(157): yii\base\View->renderFile('/opt/app/fronte...', Array, NULL)
#4 /opt/app/frontend/panels/iops/IopsPanel.php(38): yii\base\View->render('@frontend/panel...', Array)
#5 /opt/app/vendor/yiisoft/yii2-debug/src/views/default/toolbar.php(50): frontend\panels\iops\IopsPanel->getSummary()
#6 /opt/app/vendor/yiisoft/yii2/base/View.php(348): require('/opt/app/vendor...')
#7 /opt/app/vendor/yiisoft/yii2/base/View.php(258): yii\base\View->renderPhpFile('/opt/app/vendor...', Array)
#8 /opt/app/vendor/yiisoft/yii2/base/View.php(157): yii\base\View->renderFile('/opt/app/vendor...', Array, Object(yii\debug\controllers\DefaultController))
#9 /opt/app/vendor/yiisoft/yii2/base/Controller.php(438): yii\base\View->render('toolbar', Array, Object(yii\debug\controllers\DefaultController))
#10 /opt/app/vendor/yiisoft/yii2-debug/src/controllers/DefaultController.php(141): yii\base\Controller->renderPartial('toolbar', Array)
#11 [internal function]: yii\debug\controllers\DefaultController->actionToolbar('681382a68fd79')
#12 /opt/app/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#13 /opt/app/vendor/yiisoft/yii2/base/Controller.php(178): yii\base\InlineAction->runWithParams(Array)
#14 /opt/app/vendor/yiisoft/yii2/base/Module.php(552): yii\base\Controller->runAction('toolbar', Array)
#15 /opt/app/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module->runAction('debug/default/t...', Array)
#16 /opt/app/vendor/yiisoft/yii2/base/Application.php(384): yii\web\Application->handleRequest(Object(common\core\web\Request))
#17 /opt/app/frontend/web/index.php(17): yii\base\Application->run()
#18 {main}</pre>
