Magento2: Notice: Use of undefined constant MCRYPT_BLOWFISH - assumed 'MCRYPT_BLOWFISH'
Решение
It's looks like missing mcrypt
sudo apt-get install php7.1-mcrypt
And
sudo phpenmod mcrypt
Не связан с magento.stackexchange
Решение
It's looks like missing mcrypt
sudo apt-get install php7.1-mcrypt
And
sudo phpenmod mcrypt