5.7 publishing error

I started getting this publishing error over the weekend:

Publisher failed, error: Cannot publish to the specified directory:/
com.percussion.publisher.client.PSPublisherPluginException: Cannot publish to the specified directory:/ 
     at com.percussion.publisher.client.PSContentPublisher.process(Unknown Source) 
     at com.percussion.publisher.client.PSContentPublisher.execute(Unknown Source) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
     at java.lang.reflect.Method.invoke(Unknown Source) 
     at org.apache.soap.server.RPCRouter.invoke(RPCRouter.java:146) 
     at org.apache.soap.providers.RPCJavaProvider.invoke(RPCJavaProvider.java:129) 
     at org.apache.soap.server.http.RPCRouterServlet.doPost(RPCRouterServlet.java:354) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) 
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) 
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) 
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) 
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) 
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) 
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) 
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:825) 
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:738) 
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:526) 
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) 
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) 
     at java.lang.Thread.run(Unknown Source) 

It’s kinda vague, I checked my FTP connection to the web server and that seems fine. Any thoughts?

Thanks,
Ken