PHP Notice 'yii\base\ErrorException' with message 'Array to string conversion' 

in D:\www\zuanshixing\frontend\views\site\forgot.php:112

Stack trace:
#0 D:\www\zuanshixing\frontend\views\site\forgot.php(112): yii\base\ErrorHandler->handleError(8, 'Array to string...', 'D:\\www\\zuanshix...', 112, Array)
#1 D:\www\zuanshixing\vendor\yiisoft\yii2\base\View.php(348): require('D:\\www\\zuanshix...')
#2 D:\www\zuanshixing\vendor\yiisoft\yii2\base\View.php(257): yii\base\View->renderPhpFile('D:\\www\\zuanshix...', Array)
#3 D:\www\zuanshixing\vendor\yiisoft\yii2\base\View.php(156): yii\base\View->renderFile('D:\\www\\zuanshix...', Array, Object(frontend\controllers\SiteController))
#4 D:\www\zuanshixing\vendor\yiisoft\yii2\base\Controller.php(386): yii\base\View->render('forgot', Array, Object(frontend\controllers\SiteController))
#5 D:\www\zuanshixing\frontend\controllers\SiteController.php(247): yii\base\Controller->render('forgot', Array)
#6 [internal function]: frontend\controllers\SiteController->actionForgot()
#7 D:\www\zuanshixing\vendor\yiisoft\yii2\base\InlineAction.php(57): call_user_func_array(Array, Array)
#8 D:\www\zuanshixing\vendor\yiisoft\yii2\base\Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#9 D:\www\zuanshixing\vendor\yiisoft\yii2\base\Module.php(528): yii\base\Controller->runAction('forgot', Array)
#10 D:\www\zuanshixing\vendor\yiisoft\yii2\web\Application.php(103): yii\base\Module->runAction('site/forgot', Array)
#11 D:\www\zuanshixing\vendor\yiisoft\yii2\base\Application.php(386): yii\web\Application->handleRequest(Object(yii\web\Request))
#12 D:\www\zuanshixing\index.php(23): yii\base\Application->run()
#13 {main}