--- qremoteobjectnode.cpp.orig	2020-06-18 13:26:35.175992500 +0200
+++ qremoteobjectnode.cpp	2020-06-18 13:39:06.399892500 +0200
@@ -1784,7 +1784,9 @@
 QUrl QRemoteObjectHostBase::hostUrl() const
 {
     Q_D(const QRemoteObjectHostBase);
-    return d->remoteObjectIo->serverAddress();
+    if (d->remoteObjectIo)
+        return d->remoteObjectIo->serverAddress();
+    return QUrl();
 }
 
 /*!
@@ -2330,6 +2332,10 @@
 bool QRemoteObjectHostBase::enableRemoting(QObject *object, const SourceApiMap *api, QObject *adapter)
 {
     Q_D(QRemoteObjectHostBase);
+    if (!d->remoteObjectIo) {
+        d->setLastError(OperationNotValidOnClientNode);
+        return false;
+    }
     return d->remoteObjectIo->enableRemoting(object, api, adapter);
 }