Read the Docs build information Build id: 24451 Project: european-xfel-offline-calibration Version: latest Commit: None Date: 2022-10-10T08:17:15.430502Z State: finished Success: False [rtd-command-info] start-time: 2022-10-10T08:17:59.050389Z, end-time: 2022-10-10T08:17:59.192688Z, duration: 0, exit-code: 128 git clone --no-single-branch --depth 50 http://git.xfel.eu/gitlab/detectors/pycalibration.git . Cloning into '.'... fatal: unable to access 'https://haufs:s--zGku2dzxtv6so2xsu@git.xfel.eu/gitlab/detectors/pycalibration.git/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none