ClassCastException while using plugin.query.XWikiQuery

Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to [Ljava.lang.String;
at com.xpn.xwiki.util.Util.getSubMap(Util.java:222)
at com.xpn.xwiki.plugin.query.XWikiCriteria.getParameters(XWikiCriteria.java:15)
at com.xpn.xwiki.objects.classes.BaseClass.makeQuery(BaseClass.java:679)
at com.xpn.xwiki.plugin.query.QueryPlugin.makeQuery(QueryPlugin.java:239)
at com.xpn.xwiki.plugin.query.QueryPluginApi.makeQuery(QueryPluginApi.java:94)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:295)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:245)
... 80 more