Unfortunately, there isn't enough information in this report to make it actionable. Random failures can be difficult to diagnose when you have access to the systems and can examine differences in status and behaviors.
One of the first things to check is that you have compatible versions of both Java and the agent (slave) jar. Given the randomness, this seems unlikely but it is essential to validate it.
Try to isolate anything you can about what is different between the successes and failures. Do the failures always occur with the same action? (In this case it is DeleteDirStep.) Can you observe any differences in the types of systems where it succeeds or fails? Are there differences in the job configurations?
Are you up-to-date with Jenkins and plugin versions? Are your agents up-to-date?
Many times unexplained failures result from some combination of plugins. Tracking them down may require running experiments with disabling one or more plugins.
At a minimum, this issue report needs to include the version of Jenkins you are using, along with plugins and their versions. Perhaps others have seen some similar behavior and may be to provide ideas.