package mysql-server-5.7 5.7.19-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[OSWIN TOPNO]

I was trying to install LAMP server on my Ubuntu Desktop for school projects to work on and I was thrown with an error saying that unable to install, and something happened to "MySQL-5.7" while installation process.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: mysql-server-5.7 5.7.19-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-88.111-generic 4.4.76
Uname: Linux 4.4.0-88-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
Date: Mon Jul 31 00:23:40 2017
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2015-07-25 (736 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
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: ['sys', 'debian-5.7.flag', 'auto.cnf', 'mysql', 'performance_schema', 'ib_logfile0', 'ib_logfile1', 'ib_buffer_pool', 'ibdata1']
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-88-generic.efi.signed root=UUID=63d2ce15-92c3-4172-8ea8-cf6ad4a7fbc6 ro splash quiet
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.24
SourcePackage: mysql-5.7
Title: package mysql-server-5.7 5.7.19-0ubuntu0.16.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to xenial on 2016-09-05 (327 days ago)