Go to https://ci.blueocean.io/blue/organizations/jenkins/blueocean/detail/master/797/pipeline/

Press either log button both lead to 404 urls https://ci.blueocean.io/blue/rest/organizations/jenkins/pipelines/blueocean/branches/master/runs/797/nodes/undefined/log/?start=0

See the 'undefined' in the path that is because

const logUrl = shouldShowCV ? logGeneral.url : `${nodeKey}${this.mergedConfig.node}/log/`;

only works if there is a node.