An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /home/perletur/perletur.no/craft/vendor/yiisoft/yii2/web/Response.php on line 434. in /home/perletur/perletur.no/craft/vendor/yiisoft/yii2/web/Response.php:369
Stack trace:
#0 /home/perletur/perletur.no/craft/vendor/yiisoft/yii2/web/Response.php(342): yii\web\Response->sendHeaders()
#1 /home/perletur/perletur.no/craft/vendor/yiisoft/yii2/web/ErrorHandler.php(136): yii\web\Response->send()
#2 /home/perletur/perletur.no/craft/vendor/craftcms/cms/src/web/ErrorHandler.php(199): yii\web\ErrorHandler->renderException()
#3 /home/perletur/perletur.no/craft/vendor/yiisoft/yii2/base/ErrorHandler.php(152): craft\web\ErrorHandler->renderException()
#4 /home/perletur/perletur.no/craft/vendor/craftcms/cms/src/web/ErrorHandler.php(74): yii\base\ErrorHandler->handleException()
#5 [internal function]: craft\web\ErrorHandler->handleException()
#6 {main}
Previous exception:
Error: Class "Whoops\Run" not found in /home/perletur/perletur.no/index.php:42
Stack trace:
#0 {main}