Reconciling with SPARQL not possible with NL API end point

[VDK]

I've also described this as issue #3852 for OpenRefine

When using OpenRefine, the following steps lead to an error message:

Reconcile against the Dutch api (https://wikidata.reconci.link/nl/api)
Add column from reconciled values...
Add property "Scommonswiki"

The Error:

Exception caught (114ms) java.io.IOException: Data extension query failed - code: 403 message: Forbidden at com.google.refine.model.recon.ReconciledDataExtensionJob.performQuery(ReconciledDataExtensionJob.java:238) at com.google.refine.model.recon.ReconciledDataExtensionJob.extend(ReconciledDataExtensionJob.java:190) at com.google.refine.commands.recon.PreviewExtendDataCommand.doPost(PreviewExtendDataCommand.java:140) at com.google.refine.RefineServlet.service(RefineServlet.java:187) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166) at org.mortbay.servlet.UserAgentFilter.doFilter(UserAgentFilter.java:81) at org.mortbay.servlet.GzipFilter.doFilter(GzipFilter.java:132) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

This isn't an issue with the English language API