Same issue : PHP Fatal error: Uncaught IntlException: Constructor failed in /var/www/osticket/include/class.config.php\nStack trace:\n#0 /var/www/osticket/include/class.config.php(362): IntlDateFormatter->__construct('fr', 3, -1, '', 1)\n#1 /var/www/osticket/include/ajax.config.php(43): OsticketConfig->getDateFormat(true)\n#2 /var/www/osticket/include/staff/footer.inc.php(62): ConfigAjaxAPI->scp(false)\n#3 /var/www/osticket/scp/upgrade.php(88): require('/var/www/ostick...')\n#4 {main}\n thrown in /var/www/osticket/include/class.config.php on line 362 PHP Fatal error: Uncaught IntlException: Constructor failed in /var/www/osticket/include/class.config.php\nStack trace:\n#0 /var/www/osticket/include/class.config.php(362): IntlDateFormatter->__construct('fr', 3, -1, '', 1)\n#1 /var/www/osticket/include/ajax.config.php(43): OsticketConfig->getDateFormat(true)\n#2 /var/www/osticket/include/staff/footer.inc.php(62): ConfigAjaxAPI->scp(false)\n#3 /var/www/osticket/scp/upgrade.php(88): require('/var/www/ostick...')\n#4 /var/www/osticket/scp/admin.inc.php(34): require('/var/www/ostick...')\n#5 /var/www/osticket/scp/upgrade.php(16): require_once('/var/www/ostick...')\n#6 /var/www/osticket/scp/staff.inc.php(118): require('/var/www/ostick...')\n#7 /var/www/osticket/scp/autocron.php(18): require('/var/www/ostick...')\n#8 {main}\n thrown in /var/www/osticket/include/class.config.php on line 362, referer: http://serveraddress/osticket/scp/upgrade.php PHP Fatal error: Uncaught IntlException: Constructor failed in /var/www/osticket/include/class.config.php\nStack trace:\n#0 /var/www/osticket/include/class.config.php(362): IntlDateFormatter->__construct('fr', 3, -1, '', 1)\n#1 /var/www/osticket/include/ajax.config.php(43): OsticketConfig->getDateFormat(true)\n#2 /var/www/osticket/include/staff/footer.inc.php(62): ConfigAjaxAPI->scp(false)\n#3 /var/www/osticket/scp/upgrade.php(88): require('/var/www/ostick...')\n#4 {main}\n thrown in /var/www/osticket/include/class.config.php on line 362, referer: http://serveraddress/osticket/scp/upgrade.php PHP Fatal error: Uncaught Exception: DateTimeZone:(): Unknown or bad timezone () in /var/www/osticket/include/class.format.php\nStack trace:\n#0 /var/www/osticket/include/class.format.php(527): DateTimeZone->__construct('')\n#1 /var/www/osticket/include/class.format.php(672): Format:(1521120309, '', true, 0, 3, '%x %X', '', false)\n#2 /var/www/osticket/include/staff/syslogs.inc.php(158): Format:('2018-03-15 14...')\n#3 /var/www/osticket/scp/logs.php(56): require('/var/www/ostick...')\n#4 {main}\n thrown in /var/www/osticket/include/class.format.php on line 527, referer: http://serveraddress/osticket/scp/upgrade.php PHP Fatal error: Uncaught Exception: DateTimeZone:(): Unknown or bad timezone () in /var/www/osticket/include/class.format.php\nStack trace:\n#0 /var/www/osticket/include/class.format.php(527): DateTimeZone->__construct('')\n#1 /var/www/osticket/include/class.format.php(672): Format:(1521120309, '', true, 0, 3, '%x %X', '', false)\n#2 /var/www/osticket/include/ajax.content.php(32): Format:('2018-03-15 14...')\n#3 /var/www/osticket/include/class.dispatcher.php(145): ContentAjaxAPI->log('878')\n#4 /var/www/osticket/include/class.dispatcher.php(38): UrlMatcher->dispatch('log/878', Array)\n#5 /var/www/osticket/include/class.dispatcher.php(120): Dispatcher->resolve('log/878', Array)\n#6 /var/www/osticket/include/class.dispatcher.php(38): UrlMatcher->dispatch('/content/log/87...', NULL)\n#7 /var/www/osticket/scp/ajax.php(262): Dispatcher->resolve('/content/log/87...')\n#8 {main}\n thrown in /var/www/osticket/include/class.format.php on line 527, referer: http://serveraddress/osticket/scp/logs.php PHP Fatal error: Uncaught Exception: DateTimeZone:(): Unknown or bad timezone () in /var/www/osticket/include/class.format.php\nStack trace:\n#0 /var/www/osticket/include/class.format.php(527): DateTimeZone->__construct('')\n#1 /var/www/osticket/include/class.format.php(672): Format:(1521120309, '', true, 0, 3, '%x %X', '', false)\n#2 /var/www/osticket/include/ajax.content.php(32): Format:('2018-03-15 14...')\n#3 /var/www/osticket/include/class.dispatcher.php(145): ContentAjaxAPI->log('878')\n#4 /var/www/osticket/include/class.dispatcher.php(38): UrlMatcher->dispatch('log/878', Array)\n#5 /var/www/osticket/include/class.dispatcher.php(120): Dispatcher->resolve('log/878', Array)\n#6 /var/www/osticket/include/class.dispatcher.php(38): UrlMatcher->dispatch('/content/log/87...', NULL)\n#7 /var/www/osticket/scp/ajax.php(262): Dispatcher->resolve('/content/log/87...')\n#8 {main}\n thrown in /var/www/osticket/include/class.format.php on line 527, referer: http://serveraddress/osticket/scp/logs.php