While installing magento 2 fresh version, found this issue on server, rtrim() expects parameter 1 to be string, bool given#0 /home/..../vendor/magento/framework/Encryption/Adapter/Mcrypt.php(171): rtrim() #1 /home/..../vendor/magento/framework/Encryption/Encryptor.php(452): MagentoFrameworkEncryptionAdapterMcrypt->decrypt() #2 /home/..../vendor/magento/module-config/Model/Config/Backend/Encrypted.php(111): MagentoFrameworkEncryptionEncryptor->decrypt() According to Magento DevDocs mcrypt extension is not needed and it’s already removed on php 7.2. FYI, sodium, openssl and other extension […]