Codestream: Plugin crashes on IDE startup.

Describe the bug
Codestream Plugin fails to load on IntelliJ IDEA Ultimate. The IDEA does not crash, but the plugin error appears with a tracktrace and it remains unusable.

System Info (please complete the following information):

• Version of the CodeStream extension: 2.1.0+1
• OS:
  Linux Mint 19.1
  5.2.11-050211-generic
• Intellij IDEA Ultimate 2019.2.1 - idea-IU-192.6262.58

Log Files

2019-09-05 13:07:29,809 [   3538]   INFO - .codestream.agent.AgentService - Initializing CodeStream LSP agent 
2019-09-05 13:07:30,071 [   3800]   INFO - j.ide.script.IdeStartupScripts - 0 startup script(s) found 
2019-09-05 13:07:30,152 [   3881]   INFO - .codestream.agent.AgentService - CodeStream LSP agent extracted to /tmp/codestream17722175128169212956.tmp/codestream-agent 
2019-09-05 13:07:30,152 [   3881]   INFO - .codestream.agent.AgentService - xdg-open extracted to /tmp/codestream17722175128169212956.tmp/xdg-open 
2019-09-05 13:07:30,230 [   3959]   INFO - .codestream.agent.AgentService - LSP agent terminated with exit code 4 
2019-09-05 13:07:30,231 [   3960]   WARN - .codestream.agent.AgentService - Pkg: FLAGS_MISMATCH 
2019-09-05 13:07:30,251 [   3980]  ERROR - .codestream.agent.AgentService - java.io.IOException: Stream closed 
org.eclipse.lsp4j.jsonrpc.JsonRpcException: java.io.IOException: Stream closed
    at org.eclipse.lsp4j.jsonrpc.json.StreamMessageConsumer.consume(StreamMessageConsumer.java:72)
    at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.request(RemoteEndpoint.java:161)
    at org.eclipse.lsp4j.jsonrpc.services.EndpointProxy.invoke(EndpointProxy.java:91)
    at com.sun.proxy.$Proxy82.initialize(Unknown Source)
    at com.codestream.agent.AgentService.initAgent(AgentService.kt:98)
    at com.codestream.agent.AgentService.initAgent$default(AgentService.kt:81)
    at com.codestream.agent.AgentService$1.invokeSuspend(AgentService.kt:71)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
    at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:238)
    at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:594)
    at kotlinx.coroutines.scheduling.CoroutineScheduler.access$runSafely(CoroutineScheduler.kt:60)
    at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:742)
Caused by: java.io.IOException: Stream closed
    at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442)
    at java.base/java.io.OutputStream.write(OutputStream.java:157)
    at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81)
    at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142)
    at org.eclipse.lsp4j.jsonrpc.json.StreamMessageConsumer.consume(StreamMessageConsumer.java:69)
    ... 11 more