autoload.php and status.php error

[alfirus]

Hi,

I'm using fresh Ubuntu 14, Installlation work fine, but when i trying to access via web, it shows error 500. Below is apache2/error.log

[Thu Aug 03 23:43:11.998878 2017] [:error] [pid 4617] [client 192.168.0.165:59833] PHP Warning: require_once(/var/www/html/a2billing/common/lib/../../vendor/autoload.php): failed to open stream: No such file or directory in /var/www$
[Thu Aug 03 23:43:11.998917 2017] [:error] [pid 4617] [client 192.168.0.165:59833] PHP Fatal error: require_once(): Failed opening required '/var/www/html/a2billing/common/lib/../../vendor/autoload.php' (include_path='.:/usr/share/p$
[Thu Aug 03 23:43:15.970185 2017] [:error] [pid 4618] [client 192.168.0.165:59835] PHP Warning: require_once(/var/www/html/a2billing/common/lib/../../vendor/autoload.php): failed to open stream: No such file or directory in /var/www$
[Thu Aug 03 23:43:15.970233 2017] [:error] [pid 4618] [client 192.168.0.165:59835] PHP Fatal error: require_once(): Failed opening required '/var/www/html/a2billing/common/lib/../../vendor/autoload.php' (include_path='.:/usr/share/p$
[Thu Aug 03 23:43:16.568148 2017] [:error] [pid 4614] [client 192.168.0.165:59834] PHP Warning: require_once(/var/www/html/a2billing/common/lib/../../vendor/autoload.php): failed to open stream: No such file or directory in /var/www$
[Thu Aug 03 23:43:16.568193 2017] [:error] [pid 4614] [client 192.168.0.165:59834] PHP Fatal error: require_once(): Failed opening required '/var/www/html/a2billing/common/lib/../../vendor/autoload.php' (include_path='.:/usr/share/p$
[Thu Aug 03 23:43:17.108679 2017] [:error] [pid 4615] [client 192.168.0.165:59836] PHP Warning: require_once(/var/www/html/a2billing/common/lib/../../vendor/autoload.php): failed to open stream: No such file or directory in /var/www$
[Thu Aug 03 23:43:17.108720 2017] [:error] [pid 4615] [client 192.168.0.165:59836] PHP Fatal error: require_once(): Failed opening required '/var/www/html/a2billing/common/lib/../../vendor/autoload.php' (include_path='.:/usr/share/p$
[Thu Aug 03 23:43:28.047129 2017] [:error] [pid 4637] [client 192.168.0.1:59873] script '/var/www/html/status.php' not found or unable to stat
[Thu Aug 03 23:44:00.087019 2017] [:error] [pid 4617] [client 192.168.0.1:59938] script '/var/www/html/status.php' not found or unable to stat

Anyone can help?