Could not collect data and has multiple errors when connecting to private enterprise repository

[EjnarAz]

We are trying to connect our private enterprise repository that needs VPN to access to Hygieia using the Gitlab scm collector but we are having issues with the following errors:

Failed to retrieve data, the repo or collector is most likey misconfigured

org.springframework.web.client.HttpClientErrorException: 404 Not Found org.springframework.web.client.ResourceAccessException: I/O error on GET request for "https://gitlab.ourcompany.com:443/api/v4/projects/ourrepo%2Fcode-pipelines%2Frepo1%2Frepo1-pipeline/repository/commits/?ref_name=master&since=2020-11-10T07:49:12.690Z&per_page=100": PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

below is our property file am I missing something in the configuration?

#Database Name
dbname=${HYGIEIA_API_ENV_SPRING_DATA_MONGODB_DATABASE:-dashboarddb}

#Database HostName - default is localhost
dbhost=${MONGODB_HOST:-10.1.1.1}

#Database Port - default is 27017
dbport=${MONGODB_PORT:-27017}

#Database Username - default is blank
dbusername=${HYGIEIA_API_ENV_SPRING_DATA_MONGODB_USERNAME:-dashboarduser}

#Database Password - default is blank
dbpassword=${HYGIEIA_API_ENV_SPRING_DATA_MONGODB_PASSWORD:-dbpassword}

#Collector schedule (required)
gitlab.cron=${GITLAB_CRON:-*/60 * * * * *}

#Gitlab host (optional, defaults to "gitlab.com")
gitlab.host=${GITLAB_HOST:-gitlab.company.com}

#Gitlab protocol (optional, defaults to "http")
gitlab.protocol=${GITLAB_PROTOCOL:-https}

#Gitlab port (optional, defaults to protocol default port)
gitlab.port=${GITLAB_PORT:-443}

#Gitlab path (optional, defaults to no path)
gitlab.path=${GITLAB_PATH:-}

#Gitlab API Token (required, access token can be retrieved through gitlab, collector will have the permissions of the user associated to the token)
gitlab.apiToken=${GITLAB_API_TOKEN:-"generated personal token from gitlab with all the scopes"}

#Maximum number of days to go back in time when fetching commits
gitlab.commitThresholdDays=${GITLAB_COMMIT_THRESHOLD_DAYS:-15}

#Gitlab Instance using self signed certificate
gitlab.selfSignedCertificate=${GITLAB_SELF_SIGNED_CERTIFICATE:-true}

#Gitlab API Version (optional, defaults to current version of 4)
gitlab.apiVersion=${GITLAB_API_VERSION:-4}

EOF

echo "

===========================================
Properties file created `date`:  $PROP_FILE
Note: passwords hidden
===========================================
`cat $PROP_FILE |egrep -vi password`
 "

exit 0

any form of help would be highly appreciated thanks!