After the last Jenkins update (from 2.140 to 2.144) I see a lot of warnings in the Jenkins logs:

Actions from com.github.jenkins.lastchanges.LastChangesProjectAction$LastChangesActionFactory@72b8d345 for hudson.model.FreeStyleProject@40fdcb64[testing/limit-hosts] included null not assignable to interface hudson.model.Action

It doesn't affect each job, but - what is the most surprising - also some jobs without SCM configured have that warning (example in the logs above). In the attachment, you can find an XML of this job (it's just a simple job with one parameter and one shell step).

Such logs appear after I open a job. It's not needed to configure or run a job. The problem exists in both types - with Last Changes active and configured and without that.