According to the code inspection, there is a JEP-200 issue in the plugin:

• https://github.com/jenkinsci/cloudcoreo-deploytime-plugin/blob/4be75455a056a0fb80ad14cd544e608956775153/src/main/java/com/cloudcoreo/plugins/jenkins/CloudCoreoBuildWrapper.java#L36
• https://github.com/jenkinsci/cloudcoreo-deploytime-plugin/blob/4be75455a056a0fb80ad14cd544e608956775153/src/main/java/com/cloudcoreo/plugins/jenkins/CloudCoreoPublisher.java#L33

This code likely causes a JEP-200 security exception when the object gets persisted to the disk. "java.io.PrintStream" is not whitelisted in Jenkins for a reason, because loggers are not expected reliably after being deserialized from the disk.

Useful links about JEP-200:

• Blog post for users: https://jenkins.io/blog/2018/03/15/jep-200-lts/
• JEP-200 guidelines for plugin developers: https://jenkins.io/blog/2018/01/13/jep-200/#for-plugin-developers