diff --git a/qfieldsync/core/offline_converter.py b/qfieldsync/core/offline_converter.py
index 563b1d72..6629fcec 100644
--- a/qfieldsync/core/offline_converter.py
+++ b/qfieldsync/core/offline_converter.py
@@ -50,6 +50,7 @@
     QgsProviderMetadata,
     QgsEditorWidgetSetup
 )
+
 import qgis
 
 
@@ -57,6 +58,7 @@ class OfflineConverter(QObject):
     progressStopped = pyqtSignal()
     task_progress_updated = pyqtSignal(int, int)
     total_progress_updated = pyqtSignal(int, int, str)
+    message_emitted = pyqtSignal(str, Qgis.MessageLevel)
 
     def __init__(self, project, export_folder, extent, offline_editing):
         super(OfflineConverter, self).__init__(parent=None)
@@ -259,6 +261,12 @@ def convert(self):
                             if ews.type() == 'ValueRelation':
                                 widget_config = ews.config()
                                 online_layer_id = widget_config['Layer']
+                                if not online_layer_id:
+                                    self.message_emitted.emit(
+                                        f'For field "{field.name()}" in layer "{layer.name()}", the value relation widget has no layer set',
+                                        Qgis.MessageLevel.Warning
+                                    )
+                                    continue
                                 if project.mapLayer(online_layer_id):
                                     continue
 
diff --git a/qfieldsync/gui/package_dialog.py b/qfieldsync/gui/package_dialog.py
index c971c766..365d7d07 100644
--- a/qfieldsync/gui/package_dialog.py
+++ b/qfieldsync/gui/package_dialog.py
@@ -119,6 +119,7 @@ def package_project(self):
         # progress connections
         offline_convertor.total_progress_updated.connect(self.update_total)
         offline_convertor.task_progress_updated.connect(self.update_task)
+        offline_convertor.message_emitted.connect(lambda message, level: self.iface.messageBar().pushMessage('QFieldSync', message, level))
 
         offline_convertor.convert()
         self.do_post_offline_convert_action()