I’m getting “gcasc.ClientInitializationError: GitLab token was not provided. It must be defined in GITLAB_CLIENT_TOKEN environment variable”

It is likely that you provided invalid GitLab client configuration. If you use configuration file, verify if it has all required configuration parameters and that GITLAB_CLIENT_CONFIG_FILE environment variable is set to a path where your config file is. If you use environment variables, verify that you provided all necessary variables. See the :ref:client configuration <client_configuration> for details.