find below ending lines of /tmp/autoinstaller3.log:
(regen obsoletes cache)
[2015-09-14 01:20:48.344179] Check package set before installation
[2015-09-14 01:20:48.344566] The following packages from not selected components will be installed because they are required by other components' packages you selected for installation:
[2015-09-14 01:20:48.344658] The following components should be removed due to packages dependencies: ~empty
[2015-09-14 01:21:05.339313] Installing packages
[2015-09-14 01:21:05.385210] Bootstrapper has finished action (exec time: 0 sec.): parent_name='PLESK_11_5_30', sequence='prep', stage='execute', sequence_order='-1', operation='install', exec_cmd='touch /tmp/pp-bootstrapper-mode.flag; touch /var/lock/parallels-panel-maintenance-mode.flag; rm -f /var/lock/parallels-panel-upgrade-failure.flag; :'', m_arch='', output: ~empty
[2015-09-14 01:21:05.412839] sh: /usr/local/psa/bootstrapper/pp11.5.30-bootstrapper/bootstrapper.sh: No such file or directory
Bootstrapper has finished action (exec time: 0 sec.): parent_name='panel', sequence='prep', stage='execute', sequence_order='0', operation='install', exec_cmd='/usr/local/psa/bootstrapper/pp11.5.30-bootstrapper/bootstrapper.sh prep-install BASE'', m_arch='', output: ~empty
[2015-09-14 01:21:05.422205] Bootstrapper has finished action (exec time: 0 sec.): parent_name='PLESK_11_5_30', sequence='prep', stage='rollback', sequence_order='1', operation='install', exec_cmd='rm -f /tmp/pp-bootstrapper-mode.flag; rm -f /var/lock/parallels-panel-maintenance-mode.flag; rm -f /var/lock/parallels-panel-upgrade-failure.flag; :'', m_arch='', output: ~empty
[2015-09-14 01:21:05.561548] Execute command /usr/local/psa/admin/bin/send-error-report install --version 11.5.30
[2015-09-14 01:21:05.574741] FileFetcher: get file (~empty)/PSA_11.5.30/plesk-11.5.30-cos5-x86_64.inf3
[2015-09-14 01:21:14.883824] FileFetcher: get file (~empty)/SITEBUILDER_11.5.10/sitebuilder-11.5.10-rhall-all.inf3
[2015-09-14 01:21:18.794162] FileFetcher: get file (~empty)/BILLING_11.5.30/billing-11.5.30-rhall-all.inf3
[2015-09-14 01:21:24.223892] FileFetcher: get file (~empty)/MYSQL_5.5.37/mysql-5.5.37-rhel5-x86_64.inf3
[2015-09-14 01:21:29.750832] FileFetcher: get file (~empty)/MYSQL_5.5/mysql-5.5.37-rhel5-x86_64.inf3
[2015-09-14 01:21:54.644046] FileFetcher: get file (~empty)/APACHE_2.2.24/apache-2.2.24-rh5-x86_64.inf3
[2015-09-14 01:22:06.839165] FileFetcher: get file (~empty)/NGINX_1.5.13/nginx-1.5.13-cos5-x86_64.inf3
[2015-09-14 01:22:17.176630] FileFetcher: get file (~empty)/NGINX_1.5.0/nginx-1.5.0-cos5-x86_64.inf3
[2015-09-14 01:22:22.052112] Error: An error occurred during performing of installation PREP actions (see log for details). Installation was rolled back.
Warning! Not all packages were installed.
Please check if your system services are operable.
Please resolve this issue and try installing the packages again.
If you cannot resolve the issue on your own, contact product technical support for assistance.