After upgrading from 2.235 to 2.266, the Gerrit Trigger plugin throws a ClassCastException as follows:

java.lang.ClassCastException: class com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.GerritTrigger.setTriggerOnEvents() expects class com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.events.PluginGerritEvent but received class org.jenkinsci.plugins.workflow.cps.DSL$NamedArgsAndClosure
 

The full log is attached.
The Jenkinsfile for this job is at
https://github.com/asterisk/asterisk/blob/16/tests/CI/unittests.jenkinsfile

Unfortunately, downgrading back to 2.235 down't work because there must have been internal changes that make all our jobs disappear.

Our entire CI process is currently at a standstill but we'd like to avoid taking the drastic action of restoring from backups.