I found error.log on my cloud apache
[Tue Nov 08 11:04:21.578332 2016] [mpm_prefork:notice] [pid 1664] AH00163: Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.20 configured – resuming normal operations
[Tue Nov 08 11:04:21.578407 2016] [core:notice] [pid 1664] AH00094: Command line: ‘/usr/sbin/apache2’
please let me know how to fix