WARNING: -------------------------------
Errors while execute: 'Check printer subprocess
Exception in thread "Thread-2" java.lang.InternalError: Can't connect to X11 window server using '$DISPLAY_SITE' as the value of the DISPLAY variable.
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.access$100(X11GraphicsEnvironment.java:52)
at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:155)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:89)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at java.awt.Toolkit$2.run(Toolkit.java:834)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:826)
at sun.print.CUPSPrinter.<clinit>(CUPSPrinter.java:61)
at sun.print.UnixPrintServiceLookup.getDefaultPrintService(UnixPrintServiceLookup.java:503)
at sun.print.UnixPrintServiceLookup.refreshServices(UnixPrintServiceLookup.java:186)
at sun.print.UnixPrintServiceLookup$PrinterChangeListener.run(UnixPrintServiceLookup.java:734)
-------------------------------