The "Copy URL" button is initially enabled and shouldn't be. It should only be enabled when there is a selection in the table.

java.lang.IllegalArgumentException: The workspace argument may not be null
at org.modeshape.common.util.CheckArg.isNotNull(CheckArg.java:387)
at org.modeshape.web.jcr.rest.client.json.JsonRestClient.getUrl(JsonRestClient.java:229)
at org.jboss.tools.modeshape.rest.ServerManager.getUrl(ServerManager.java:271)
at org.jboss.tools.modeshape.rest.dialogs.PublishedLocationsDialog.getPublishedAtUrl(PublishedLocationsDialog.java:284)
at org.jboss.tools.modeshape.rest.dialogs.PublishedLocationsDialog.handleCopyUrl(PublishedLocationsDialog.java:305)
at org.jboss.tools.modeshape.rest.dialogs.PublishedLocationsDialog$2.widgetSelected(PublishedLocationsDialog.java:255)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)