Internal Server Error

java.lang.IllegalStateException: javax.xml.stream.XMLStreamException: Illegal input: comment content has embedded -- in it (index 44)
	at info.textgrid.services.aggregator.teicorpus.TEICorpusSerializer.writeSkip(TEICorpusSerializer.java:295)
	at info.textgrid.services.aggregator.teicorpus.TEICorpusSerializer.walk(TEICorpusSerializer.java:145)
	at info.textgrid.services.aggregator.tree.AggregationTreeWalker.walkAggregation(AggregationTreeWalker.java:116)
	at info.textgrid.services.aggregator.teicorpus.TEICorpusSerializer.walkAggregation(TEICorpusSerializer.java:184)
	at info.textgrid.services.aggregator.tree.AggregationTreeWalker.walk(AggregationTreeWalker.java:56)
	at info.textgrid.services.aggregator.teicorpus.TEICorpusSerializer.walk(TEICorpusSerializer.java:138)
	at info.textgrid.services.aggregator.teicorpus.TEICorpusSerializer.write(TEICorpusSerializer.java:119)
	at info.textgrid.services.aggregator.teicorpus.CorpusBasedExporter.loadSource(CorpusBasedExporter.java:136)
	at info.textgrid.services.aggregator.html.HTMLWriter.getSource(HTMLWriter.java:220)
	at info.textgrid.services.aggregator.html.HTMLWriter.createResponse(HTMLWriter.java:322)
	at info.textgrid.services.aggregator.REST.getHTML(REST.java:152)
	at jdk.internal.reflect.GeneratedMethodAccessor76.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:179)
	at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)
	at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:200)
	at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:103)
	at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59)
	at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96)
	at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:307)
	at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
	at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267)
	at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:233)
	at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:207)
	at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:159)
	at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:224)
	at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:303)
	at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:221)
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564)
	at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:278)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:195)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:164)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:140)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:116)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:398)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:903)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1776)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:975)
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:493)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: javax.xml.stream.XMLStreamException: Illegal input: comment content has embedded -- in it (index 44)
	at com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1596)
	at com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1603)
	at com.ctc.wstx.sw.BaseStreamWriter.reportNwfContent(BaseStreamWriter.java:1649)
	at com.ctc.wstx.sw.BaseStreamWriter.writeComment(BaseStreamWriter.java:510)
	at org.codehaus.stax2.ri.Stax2EventWriterImpl.add(Stax2EventWriterImpl.java:137)
	at info.textgrid.services.aggregator.teicorpus.TEICorpusSerializer.writeSkip(TEICorpusSerializer.java:292)
	... 51 more