Version - Jenkins ver. 2.7.20.2 (CloudBees Jenkins Enterprise 2.7.20.2-rolling)

[EnvInject] - Loading node environment variables.
ERROR: SEVERE ERROR occurs
org.jenkinsci.lib.envinject.EnvInjectException: hudson.remoting.ChannelClosedException: channel is already closed
at org.jenkinsci.plugins.envinject.service.EnvironmentVariablesNodeLoader.gatherEnvironmentVariablesNode(EnvironmentVariablesNodeLoader.java:79)
at org.jenkinsci.plugins.envinject.EnvInjectListener.loadEnvironmentVariablesNode(EnvInjectListener.java:80)
at org.jenkinsci.plugins.envinject.EnvInjectListener.setUpEnvironment(EnvInjectListener.java:42)
at hudson.model.AbstractBuild$AbstractBuildExecution.createLauncher(AbstractBuild.java:572)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:492)
at hudson.model.Run.execute(Run.java:1741)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:410)
Caused by: hudson.remoting.ChannelClosedException: channel is already closed
at hudson.remoting.Channel.send(Channel.java:578)
at hudson.remoting.Request.call(Request.java:130)
at hudson.remoting.Channel.call(Channel.java:780)
at hudson.FilePath.act(FilePath.java:1102)
at org.jenkinsci.plugins.envinject.service.EnvironmentVariablesNodeLoader.gatherEnvironmentVariablesNode(EnvironmentVariablesNodeLoader.java:48)
... 8 more
Caused by: java.io.IOException
at hudson.remoting.Channel.close(Channel.java:1163)
at hudson.slaves.ChannelPinger$1.onDead(ChannelPinger.java:121)
at hudson.remoting.PingThread.ping(PingThread.java:130)
at hudson.remoting.PingThread.run(PingThread.java:86)
Caused by: java.util.concurrent.TimeoutException: Ping started at 1502346355486 hasn't completed by 1502346595487
... 2 more
[EnvInject] - [ERROR] - SEVERE ERROR occurs: channel is already closed
Finished: FAILURE