NullPointerException occurs "randomly" before build steps are executed, right after initial git operations. What's worse, it happens also for jobs with disabled youtrack integration (checkbox "Integrate with YouTrack" is unchecked).

The same jenkins instance has jobs where YouTrack integration is enabled and it works as expected.

Build ends with following error:

11:32:18 FAILED: log in with set YouTrack userjava.lang.NullPointerException
11:32:18 at org.jenkinsci.plugins.youtrack.youtrackapi.YouTrackServer.getProjects(YouTrackServer.java:284)
11:32:18 at org.jenkinsci.plugins.youtrack.YoutrackIssueUpdater.performActions(YoutrackIssueUpdater.java:112)
11:32:18 at org.jenkinsci.plugins.youtrack.YoutrackIssueUpdater.update(YoutrackIssueUpdater.java:98)
11:32:18 at org.jenkinsci.plugins.youtrack.YouTrackSCMListener.onChangeLogParsed(YouTrackSCMListener.java:30)
11:32:18 at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:576)
11:32:18 Caused: java.io.IOException: Failed to parse changelog
11:32:18 at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:578)
11:32:18 at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
11:32:18 at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:485)
11:32:18 at hudson.model.Run.execute(Run.java:1735)
11:32:18 at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
11:32:18 at hudson.model.ResourceController.execute(ResourceController.java:97)
11:32:18 at hudson.model.Executor.run(Executor.java:415)