Failing to parse HTML in WYSIWYG when using the figure macro with a video macro

{{figure}}
{{box}}test{{/box}}
{{/figure}}

{{figure}}
{{video url="https://youtu.be/9QTWrZ7OfzI"/}}
{{/figure}}

2019-03-15 17:32:44,961 [http://localhost:8080/xwiki/bin/preview/Main/WebHome] ERROR o.x.w.i.c.DefaultHTMLConverter - Failed to parse input source 
org.xwiki.rendering.parser.ParseException: Failed to parse input source
	at org.xwiki.rendering.internal.parser.wikimodel.AbstractWikiModelParser.parse(AbstractWikiModelParser.java:132)
	at org.xwiki.rendering.internal.parser.xhtml.XHTMLParser.parse(XHTMLParser.java:217)
	at org.xwiki.rendering.internal.parser.wikimodel.AbstractWikiModelParser.parse(AbstractWikiModelParser.java:108)
	at org.xwiki.rendering.internal.parser.xhtml.XHTMLParser.parse(XHTMLParser.java:208)
	at org.xwiki.wysiwyg.internal.converter.DefaultHTMLConverter.fromHTML(DefaultHTMLConverter.java:136)
	at org.xwiki.wysiwyg.filter.ConversionFilter.convertHTML(ConversionFilter.java:144)
	at org.xwiki.wysiwyg.filter.ConversionFilter.access$000(ConversionFilter.java:51)
	at org.xwiki.wysiwyg.filter.ConversionFilter$1.run(ConversionFilter.java:126)
	at org.xwiki.context.concurrent.ExecutionContextRunnable.run(ExecutionContextRunnable.java:70)
	at org.xwiki.wysiwyg.filter.ConversionFilter.convertHTMLWithExecutionContext(ConversionFilter.java:128)
	at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:102)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1629)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:530)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.xwiki.rendering.wikimodel.WikiParserException: java.lang.NullPointerException
	at org.xwiki.rendering.wikimodel.xhtml.XhtmlParser.parse(XhtmlParser.java:134)
	at org.xwiki.rendering.internal.parser.wikimodel.AbstractWikiModelParser.parse(AbstractWikiModelParser.java:130)
	... 49 common frames omitted
Caused by: java.lang.NullPointerException: null
	at org.xwiki.rendering.internal.parser.xhtml.wikimodel.XWikiMacroHandler.handleEnd(XWikiMacroHandler.java:177)
	at org.xwiki.rendering.internal.parser.xhtml.wikimodel.XWikiDivTagHandler.end(XWikiDivTagHandler.java:71)
	at org.xwiki.rendering.wikimodel.xhtml.handler.TagHandler.endElement(TagHandler.java:85)
	at org.xwiki.rendering.wikimodel.xhtml.impl.TagContext.endElement(TagContext.java:81)
	at org.xwiki.rendering.wikimodel.xhtml.impl.TagStack.endElement(TagStack.java:123)
	at org.xwiki.rendering.wikimodel.xhtml.impl.XhtmlHandler.endElement(XhtmlHandler.java:201)
	at org.xml.sax.helpers.XMLFilterImpl.endElement(XMLFilterImpl.java:570)
	at org.xwiki.rendering.wikimodel.xhtml.filter.XHTMLWhitespaceXMLFilter.endElement(XHTMLWhitespaceXMLFilter.java:190)
	at org.xml.sax.helpers.XMLFilterImpl.endElement(XMLFilterImpl.java:570)
	at org.xwiki.rendering.wikimodel.xhtml.filter.AccumulationXMLFilter.endElement(AccumulationXMLFilter.java:86)
	at org.xml.sax.helpers.XMLFilterImpl.endElement(XMLFilterImpl.java:570)
	at org.xwiki.rendering.wikimodel.xhtml.filter.DTDXMLFilter.endElement(DTDXMLFilter.java:86)
	at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
	at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at org.apache.xerces.parsers.XML11NonValidatingConfiguration.parse(Unknown Source)
	at org.apache.xerces.parsers.XML11NonValidatingConfiguration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:357)
	at org.xwiki.rendering.wikimodel.xhtml.filter.DefaultXMLFilter.parse(DefaultXMLFilter.java:58)
	at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:357)
	at org.xwiki.rendering.wikimodel.xhtml.filter.DefaultXMLFilter.parse(DefaultXMLFilter.java:58)
	at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:357)
	at org.xwiki.rendering.wikimodel.xhtml.filter.DefaultXMLFilter.parse(DefaultXMLFilter.java:58)
	at org.xwiki.rendering.wikimodel.xhtml.XhtmlParser.parse(XhtmlParser.java:132)
	... 50 common frames omitted
2019-03-15 17:32:44,963 [http://localhost:8080/xwiki/bin/preview/Main/WebHome] ERROR o.x.w.f.ConversionFilter       - Exception while parsing HTML 
java.lang.RuntimeException: Exception while parsing HTML
	at org.xwiki.wysiwyg.internal.converter.DefaultHTMLConverter.fromHTML(DefaultHTMLConverter.java:141)
	at org.xwiki.wysiwyg.filter.ConversionFilter.convertHTML(ConversionFilter.java:144)
	at org.xwiki.wysiwyg.filter.ConversionFilter.access$000(ConversionFilter.java:51)
	at org.xwiki.wysiwyg.filter.ConversionFilter$1.run(ConversionFilter.java:126)
	at org.xwiki.context.concurrent.ExecutionContextRunnable.run(ExecutionContextRunnable.java:70)
	at org.xwiki.wysiwyg.filter.ConversionFilter.convertHTMLWithExecutionContext(ConversionFilter.java:128)
	at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:102)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
	at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1629)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:530)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.xwiki.rendering.parser.ParseException: Failed to parse input source
	at org.xwiki.rendering.internal.parser.wikimodel.AbstractWikiModelParser.parse(AbstractWikiModelParser.java:132)
	at org.xwiki.rendering.internal.parser.xhtml.XHTMLParser.parse(XHTMLParser.java:217)
	at org.xwiki.rendering.internal.parser.wikimodel.AbstractWikiModelParser.parse(AbstractWikiModelParser.java:108)
	at org.xwiki.rendering.internal.parser.xhtml.XHTMLParser.parse(XHTMLParser.java:208)
	at org.xwiki.wysiwyg.internal.converter.DefaultHTMLConverter.fromHTML(DefaultHTMLConverter.java:136)
	... 45 common frames omitted
Caused by: org.xwiki.rendering.wikimodel.WikiParserException: java.lang.NullPointerException
	at org.xwiki.rendering.wikimodel.xhtml.XhtmlParser.parse(XhtmlParser.java:134)
	at org.xwiki.rendering.internal.parser.wikimodel.AbstractWikiModelParser.parse(AbstractWikiModelParser.java:130)
	... 49 common frames omitted
Caused by: java.lang.NullPointerException: null
	at org.xwiki.rendering.internal.parser.xhtml.wikimodel.XWikiMacroHandler.handleEnd(XWikiMacroHandler.java:177)
	at org.xwiki.rendering.internal.parser.xhtml.wikimodel.XWikiDivTagHandler.end(XWikiDivTagHandler.java:71)
	at org.xwiki.rendering.wikimodel.xhtml.handler.TagHandler.endElement(TagHandler.java:85)
	at org.xwiki.rendering.wikimodel.xhtml.impl.TagContext.endElement(TagContext.java:81)
	at org.xwiki.rendering.wikimodel.xhtml.impl.TagStack.endElement(TagStack.java:123)
	at org.xwiki.rendering.wikimodel.xhtml.impl.XhtmlHandler.endElement(XhtmlHandler.java:201)
	at org.xml.sax.helpers.XMLFilterImpl.endElement(XMLFilterImpl.java:570)
	at org.xwiki.rendering.wikimodel.xhtml.filter.XHTMLWhitespaceXMLFilter.endElement(XHTMLWhitespaceXMLFilter.java:190)
	at org.xml.sax.helpers.XMLFilterImpl.endElement(XMLFilterImpl.java:570)
	at org.xwiki.rendering.wikimodel.xhtml.filter.AccumulationXMLFilter.endElement(AccumulationXMLFilter.java:86)
	at org.xml.sax.helpers.XMLFilterImpl.endElement(XMLFilterImpl.java:570)
	at org.xwiki.rendering.wikimodel.xhtml.filter.DTDXMLFilter.endElement(DTDXMLFilter.java:86)
	at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
	at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at org.apache.xerces.parsers.XML11NonValidatingConfiguration.parse(Unknown Source)
	at org.apache.xerces.parsers.XML11NonValidatingConfiguration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:357)
	at org.xwiki.rendering.wikimodel.xhtml.filter.DefaultXMLFilter.parse(DefaultXMLFilter.java:58)
	at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:357)
	at org.xwiki.rendering.wikimodel.xhtml.filter.DefaultXMLFilter.parse(DefaultXMLFilter.java:58)
	at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:357)
	at org.xwiki.rendering.wikimodel.xhtml.filter.DefaultXMLFilter.parse(DefaultXMLFilter.java:58)
	at org.xwiki.rendering.wikimodel.xhtml.XhtmlParser.parse(XhtmlParser.java:132)
	... 50 common frames omitted