It would appear the CDK 4.1 branch is failing to build due to the testing dependency. This is also affecting upstream builds (Lhasa 4.1 and knime-update-4.1).
Cannot complete the install because one or more required items could not be found.
Software being installed: CDK Testing feature 1.5.200.v201711101057 (org.openscience.cdk.knime.testing.feature.feature.group 1.5.200.v201711101057)
Missing requirement: CDK Testing feature 1.5.200.v201711101057 (org.openscience.cdk.knime.testing.feature.feature.group 1.5.200.v201711101057) requires ‘org.knime.features.testingapplication.feature.group 2.7.0’ but it could not be found
Application failed, log file location: /var/lib/jenkins/jobs/org.lhasalimited.knime.update-4.1/workspace/nodes4knime/build/org.knime.community.build.config/director/configuration/1588150444605.log
The last commit on the 4.0 CDK branch was 9 months ago, it looks like the commit removing the dependency causing the issue was only applied to the master branch?
Does the change on the master branch need to be merged into releases/4.0?