It's a follow-up to JENKINS-24696, which has been fixed in https://github.com/jenkinsci/jenkins/pull/1950

https://github.com/jenkinsci/jenkins/commit/42de07bba60bdde51ee7123ed6c65a11cddb78ae has been backported without https://github.com/jenkinsci/jenkins/commit/d3ebb8a56d06b0a816699fb2cf0c313324c71d80 .
It causes a binary compatibility issue, because GroovyHookScript(String) constructor has been deleted. The issue appeared during the testing of the release candidate on one of our internal plugins.