Reinitialized existing Git repository ERROR: Job failed: exit status 1

I have installed gitlab-runner and also registed, but when the job excute, there are some issues below is the job log:

Running with gitlab-runner 12.5.0 (577f813d)
  on steven-runner 335261eb
Using Shell executor...
Running on OYO02236.local...
Fetching changes...
Reinitialized existing Git repository in /Users/steven/builds/335261eb/0/ios/flash/Flash/.git/
ERROR: Job failed: exit status 1

Infact, i think the .gitlab-ci.yml is correctly, bucause when i install and register gitlab-runner in others mac do the same steps, its works.

the only difference is that I have been installed the gitlab-runner use both Manual installation (official) and Homebrew installation (alternative) ways

some additional information

$ gitlab-runner run
Runtime platform                                    arch=amd64 os=darwin pid=3228 revision=577f813d version=12.5.0
Starting multi-runner from /Users/steven/.gitlab-runner/config.toml ...  builds=0
WARNING: Running in user-mode.                     
WARNING: Use sudo for system-mode:                 
WARNING: $ sudo gitlab-runner...                   
                                                   
Configuration loaded                                builds=0
Locking configuration file                          builds=0 file=/Users/steven/.gitlab-runner/config.toml pid=3228
listen_address not defined, metrics & debug endpoints disabled  builds=0
[session_server].listen_address not defined, session endpoints disabled  builds=0