Exception in Netbeans when stopping at breakpoint #61

I use the following:
Netbeans 8.0.1
CentOS
ruby-debug-ide-0.4.23.beta9

When stopping at breakpoint the following exception occurs in Netbeans:
java.lang.IllegalStateException: Unexpected event. Expecting variable end tag.value
at org.rubyforge.debugcommons.reader.XmlStreamReader.ensureEndTag(XmlStreamReader.java:41)
at org.rubyforge.debugcommons.reader.VariablesReader.parseVariables(VariablesReader.java:90)
at org.rubyforge.debugcommons.reader.VariablesReader.parse(VariablesReader.java:48)
at org.rubyforge.debugcommons.reader.VariablesReader.readVariables(VariablesReader.java:105)
at org.rubyforge.debugcommons.ReadersSupport.processElement(ReadersSupport.java:156)
at org.rubyforge.debugcommons.ReadersSupport.startXPPLoop(ReadersSupport.java:116)
at org.rubyforge.debugcommons.ReadersSupport.access$200(ReadersSupport.java:44)
[catch] at org.rubyforge.debugcommons.ReadersSupport$XPPLoop.run(ReadersSupport.java:271)

This didn't occur on ruby-debug-ide-0.4.23.beta1.
I tried ruby-debug-ide-0.4.23.beta7 before and I had problems with breakpoints and I think it was same problem. I returned to ruby-debug-ide-0.4.23.beta1 anyway.