Error

Command git clone --no-single-branch --depth 50 https://USER_DOC_RTD:68VjLDfLkLgej9dXmayU@git.xfel.eu/gitlab/dataAnalysis/user-documentation . failed: Cloning into '.'... fatal: unable to access 'https://USER_DOC_RTD:68VjLDfLkLgej9dXmayU@git.xfel.eu/gitlab/dataAnalysis/user-documentation/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none