UnexpectedValueException: The stream or file "/home/Magento2/mypni.de/public_html//var/log/system.log" could not be opened: failed to open stream: Permission denied in /home/Magento2/mypni.de/public_html/vendor/monolog/monolog/src/Monolog/Handler/StreamHandler.php:108
Stack trace:
#0 /home/Magento2/mypni.de/public_html/vendor/magento/framework/Logger/Handler/Base.php(88): Monolog\Handler\StreamHandler->write(Array)
#1 /home/Magento2/mypni.de/public_html/vendor/magento/framework/Logger/Handler/System.php(62): Magento\Framework\Logger\Handler\Base->write(Array)
#2 /home/Magento2/mypni.de/public_html/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(39): Magento\Framework\Logger\Handler\System->write(Array)
#3 /home/Magento2/mypni.de/public_html/vendor/monolog/monolog/src/Monolog/Logger.php(344): Monolog\Handler\AbstractProcessingHandler->handle(Array)
#4 /home/Magento2/mypni.de/public_html/vendor/magento/framework/Logger/Monolog.php(48): Monolog\Logger->addRecord(400, 'The stream or f...', Array)
#5 /home/Magento2/mypni.de/public_html/vendor/monolog/monolog/src/Monolog/Logger.php(707): Magento\Framework\Logger\Monolog->addRecord(400, 'The stream or f...', Array)
#6 /home/Magento2/mypni.de/public_html/vendor/magento/framework/App/Bootstrap.php(266): Monolog\Logger->error('The stream or f...')
#7 /home/Magento2/mypni.de/public_html/pub/index.php(40): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor))
#8 {main}