nginx 报错 monolog 的错误,错误代码如下，我是装了mongodb，然后卸载出现的。有办法解决一下吗？

Stack trace:
0 /var/www/testapp/vendor/monolog/monolog/src/Monolog/Handler/RotatingFileHandler.php(107): Monolog\Handler\StreamHandler->write(Array) 1 /var/www/testapp/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(37): Monolog\Handler\RotatingFileHandler->write(Array) 2 /var/www/testapp/vendor/monolog/monolog/src/Monolog/Logger.php(337): Monolog\Handler\AbstractProcessingHandler->handle(Array) 3 /var/www/testapp/vendor/monolog/monolog/src/Monolog/Logger.php(616): Monolog\Logger->addRecord(400, Object(Symfony\Component\Debug\Exception\FatalErrorException), Array) 4 /var/www/testapp/vendor/laravel/framework/src/Illuminate/Log