GUI does not open, error "Error while executing action: A Request to the Server failed with the following Status Code: 500"

Solution Verified - Updated -


  • After re-installing my RHEV environment, I cannot access the GUI
  • When checking server.log, it says:
ERROR [io.undertow.servlet] (default task-32) Exception while dispatching incoming RPC call: Can't find the serialization policy file. This probably means that the user has an old version of the application loaded in the browser. To solve the issue the user needs to close the browser and open it again, so that the application is reloaded.


  • Red Hat Virtualization 4.0

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