Failed to start gitlab, how to fix it?

How to Use GitLab
1

# service gitlab start
Starting unicorn: bash: bin/web: No such file or directory
[FAILED]
Starting sidekiq: bash: bin/background_jobs: No such file or directory
[FAILED

I don’t know why this is happening.
how can I solve it?

this is my information

System information
System:		CentOS 6.8
Current User:	git
Using RVM:	no
Ruby Version:	2.0.0p451
Gem Version:	2.6.8
Bundler Version:1.13.7
Rake Version:	10.1.1

GitLab information
Version:	6.7.5
Revision:	00aa5c1
Directory:	/home/git/gitlab
DB Adapter:	mysql2
URL:		https://192.168.0.230:433
HTTP Clone URL:	https://192.168.0.230:433/some-project.git
SSH Clone URL:	git@192.168.0.230:some-project.git
Using LDAP:	no
Using Omniauth:	no:433
        HTTP Clone URL:	https://192.168.0.230:433/some-project.git
        SSH Clone URL:	git@192.168.0.230:some-project.git
        Using LDAP:	no
        Using Omniauth:	no
2

it’s solved.