Persistent TCX export Error from Garmin Connect

I am getting a similar error when I export a TCX from Garmin Connect

I created a manual activity - indoor cycling. I tried to export to TCX and got this error:

HTTP Status 500 - detailMetrics or metricDescriptors is null or empty

type Exception report

message detailMetrics or metricDescriptors is null or empty

description The server encountered an internal error that prevented it from fulfilling this request.

exception

java.lang.RuntimeException: detailMetrics or metricDescriptors is null or empty
com.garmin.connect.service.download.activityexport.provider.ActivityTcxSerializer.addTrackPoints(ActivityTcxSerializer.java:329)
com.garmin.connect.service.download.activityexport.provider.ActivityTcxSerializer.addLaps(ActivityTcxSerializer.java:299)
com.garmin.connect.service.download.activityexport.provider.ActivityTcxSerializer.createActivityTcxComponent(ActivityTcxSerializer.java:170)
com.garmin.connect.service.download.activityexport.provider.ActivityTcxSerializer.buildDocument(ActivityTcxSerializer.java:79)
com.garmin.connect.service.download.activityexport.provider.ActivityTcxSerializer.serialize(ActivityTcxSerializer.java:68)
com.garmin.connect.service.download.activityexport.provider.ActivityProvider.writeTo(ActivityProvider.java:38)
com.garmin.connect.service.download.activityexport.provider.ActivityProvider.writeTo(ActivityProvider.java:21)
com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:306)
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1448)
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1360)
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1350)
com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
org.springframework.security.oauth.provider.filter.ProtectedResourceProcessingFilter.onValidSignature(ProtectedResourceProcessingFilter.java:87)
org.springframework.security.oauth.provider.filter.OAuthProviderProcessingFilter.doFilter(OAuthProviderProcessingFilter.java:168)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
com.netflix.hystrix.contrib.requestservlet.HystrixRequestContextServletFilter.doFilter(HystrixRequestContextServletFilter.java:53)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.57 logs.

TCX export error

I am also getting persistent TCX export error messages.
Activity is displaying fine in Garmin Connect with all graphs and stats but will not export to TCX