Can't commit file on gitaly and gitlab implementation

hello, i just implemented a gitlab installation using 2k reference architecture → Reference architecture: up to 2,000 users | GitLab.

then i got problem on gitaly implementation. when committing to a new file, getting the message “Could not commit. An unexpected error occurred.”

and I’ve checked the gitaly server is connected to gitlab by using the command /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml

anyone please help me. thank you