cloning repo failed due to server certificate verification failure

gitlab-ci-multi-runner 1.0.2 (ea19241) Using Shell executor... Running on localhost... Cloning repository... Cloning into '/home/gitlab-runner/builds/9f8e8a0a/0/popmetrics/popmetrics_ui'... fatal: unable to access 'https://gitlab-ci-token:xxxxxx@gitlab.athanasys.com/popmetrics/popmetrics_ui.git/': server certificate verification failed. CAfile: /home/gitlab-runner/builds/9f8e8a0a/0/popmetrics/popmetrics_ui.tmp/GIT_SSL_CAINFO CRLfile: none

the file exists ls -l /home/gitlab-runner/builds/9f8e8a0a/0/popmetrics/popmetrics_ui.tmp/GIT_SSL_CAINFO -rw-rw-r-- 1 gitlab-runner gitlab-runner 1521 Feb 6 11:13 /home/gitlab-runner/builds/9f8e8a0a/0/popmetrics/popmetrics_ui.tmp/GIT_SSL_CAINFO

the certificate is signed by a trusted authority. Using freshest Ubuntu 14.04.3 LTS

Please advise. Thank you.