[ 'request' => [ // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation 'cookieValidationKey' => '', ], 'reCaptcha' => [ 'secret' => '', ], ], ]; if (!YII_ENV_TEST) { // configuration adjustments for 'dev' environment $config['bootstrap'][] = 'debug'; $config['modules']['debug'] = \yii\debug\Module::class; $config['bootstrap'][] = 'gii'; $config['modules']['gii'] = \yii\gii\Module::class; } return $config;