Exception in translation

ERROR: before opening a hide statement you must close the previous one
at NavigAbileFilter.Version2_0.BodyLexer2_0.evalContent(String htmlbody, NavigAbileExp pageRepr) at NavigAbileFilter.Version2_0.BodyLexer2_0.eval(String htmlBody, String mode, NavigAbileExp pageRepr, TranslationHandler caller) at NavigAbileFilter.Version2_0.Interpreter2_0.Translate(Profile user, String webPage) at NavigAbileFilter.NavigAbileFilterWS.FilterRequest(String serializedProfile, String serializedAppSettings, String html, String interpreter, String absolutePath, Int32 navigAbilePage, String serializedLogParams)