package mysql-server-5.7 5.7.19-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Ross Ashley]

trying to install lamp-server in terminal, in order to install and set up Nextcloud.

ProblemType: Package
DistroRelease: Ubuntu 17.10
Package: mysql-server-5.7 5.7.19-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic i686
ApportVersion: 2.20.7-0ubuntu3
Architecture: i386
Date: Sat Oct 21 00:40:00 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
Logs.var.log.daemon.log:

MySQLConf.etc.mysql.conf.d.mysql.cnf: [mysql]
MySQLConf.etc.mysql.conf.d.mysqldump.cnf:
 [mysqldump]
 quick
 quote-names
 max_allowed_packet = 16M
MySQLConf.etc.mysql.mysql.conf.d.mysqld_safe_syslog.cnf:
 [mysqld_safe]
 syslog
MySQLVarLibDirListing: ['ib_logfile1', 'test', 'performance_schema', 'sys', 'ib_logfile0', 'debian-5.5.flag', 'ib_buffer_pool', 'cms', 'debian-5.7.flag', 'mysql', 'mysql_upgrade_info', 'debian-5.6.flag', 'ibdata1', 'auto.cnf']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic root=UUID=4d3764be-010e-4807-8be7-3c88e0157586 ro quiet splash vt.handoff=7
Python3Details: /usr/bin/python3.6, Python 3.6.3, python3-minimal, 3.6.3-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.14, python-minimal, 2.7.14-2ubuntu1
RelatedPackageVersions:
 dpkg 1.18.24ubuntu1
 apt 1.5
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.19-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)