Hi community
I'm using the Zotero add-in for LibreOffice 5.1.4.2 and Zotero 4.0.29.10 as stand-alone version.
My operation system is Ubuntu 16.04 and I use the JRE Version 8 Update 111. After clicking on the insert citation button or the Refresh button the following error occurs:

An error occurred communicating with Zotero:
com.sun.star.lang.IllegalArgumentException:
at com.sun.star.bridges.jni_uno.JNI_proxy.dispatch_call(Native Method)
at com.sun.star.bridges.jni_uno.JNI_proxy.invoke(JNI_proxy.java:185)
at com.sun.proxy.$Proxy17.compareRegionStarts(Unknown Source)
at org.zotero.integration.ooo.comp.ReferenceMark.compareTo(ReferenceMark.java:375)
at org.zotero.integration.ooo.comp.ReferenceMark.compareTo(ReferenceMark.java:1)
at java.util.ComparableTimSort.gallopRight(ComparableTimSort.java:598)
at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:462)
at java.util.ComparableTimSort.mergeCollapse(ComparableTimSort.java:404)
at java.util.ComparableTimSort.sort(ComparableTimSort.java:213)
at java.util.Arrays.sort(Arrays.java:1312)
at java.util.Arrays.sort(Arrays.java:1506)
at java.util.ArrayList.sort(ArrayList.java:1454)
at java.util.Collections.sort(Collections.java:141)
at org.zotero.integration.ooo.comp.Document.getFields(Document.java:354)
at org.zotero.integration.ooo.comp.CommMessage.execute(CommMessage.java:90)
at org.zotero.integration.ooo.comp.CommMessage.getBytes(CommMessage.java:40)
at org.zotero.integration.ooo.comp.CommServer.run(CommServer.java:60)
at java.lang.Thread.run(Thread.java:745)

I've already restarted my computer but without success.
Would be thankful for any kind of help.
Thanks!
Regards
Fini