I execute java -jar JCloisterZone.jar, and the result is:
ene. 24, 2018 1:54:27 P. M. sun.util.PropertyResourceBundleCharset$PropertiesFileDecoder decodeLoop
INFO: Invalid or unmappable UTF-8 sequence detected. Switching encoding from UTF-8 to ISO-8859-1
[Fatal Error] :1:1: Final de archivo prematuro.
Exception in thread "Thread-0" java.lang.RuntimeException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Final de archivo prematuro.
at com.jcloisterzone.XMLUtils.parseDocument(XMLUtils.java:49)
at com.jcloisterzone.XMLUtils.parseDocument(XMLUtils.java:36)
at com.jcloisterzone.AppUpdate.fetch(AppUpdate.java:15)
at com.jcloisterzone.ui.Bootstrap$2.run(Bootstrap.java:146)
Caused by: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Final de archivo prematuro.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(java.xml@9-internal/DOMParser.java:256)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(java.xml@9-internal/DocumentBuilderImpl.java:339)
at javax.xml.parsers.DocumentBuilder.parse(java.xml@9-internal/DocumentBuilder.java:122)
at com.jcloisterzone.XMLUtils.parseDocument(XMLUtils.java:47)
... 3 more
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fc9a60e7009, pid=2440, tid=2464
#
# JRE version: OpenJDK Runtime Environment (9.0) (build 9-internal+0-2016-04-14-195246.buildd.src)
# Java VM: OpenJDK 64-Bit Server VM (9-internal+0-2016-04-14-195246.buildd.src, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# C [libjava.so+0x1d009] JNU_GetEnv+0x19
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %d %P" (or dumping to /home/ffgr33/jcz/343/core.2440)
#
# An error report file with more information is saved as:
# /home/ffgr33/jcz/343/hs_err_pid2440.log
#
# If you would like to submit a bug report, please visit:
#
http://bugreport.java.com/bugreport/crash.jsp# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Aborted (`core' generado)