diff --git a/felt/gui/create_map_dialog.py b/felt/gui/create_map_dialog.py
index e635941..ca41066 100644
--- a/felt/gui/create_map_dialog.py
+++ b/felt/gui/create_map_dialog.py
@@ -61,6 +61,8 @@
 )
 from .workspaces_combo import WorkspacesComboBox
 from ..core import (
+    LayerExporter,
+    LayerSupport,
     MapUploaderTask,
     Map
 )
@@ -309,9 +311,37 @@ def upload_raster_as_styled_toggled():
             )
 
         self.started = False
-        self._validate()
+        self._validate_initial()
         self.maps_widget.filter_line_edit().setFocus()
 
+    def _fatal_error(self, error: str):
+        """
+        Called when a fatal error which prevents sharing occurs
+        """
+        self.stacked_widget.setCurrentIndex(2)
+        self.error_label.setText(error)
+        self.button_box.button(QDialogButtonBox.Ok).deleteLater()
+
+    def _validate_initial(self):
+
+        error: Optional[str] = None
+
+        export_layers = self.layers if self.layers else \
+            QgsProject.instance().mapLayers().values()
+        for layer in export_layers:
+            support, reason = LayerExporter.can_export_layer(layer)
+            if support == LayerSupport.UnsavedEdits:
+                error = self.tr(
+                        'Layer "{}" has unsaved changes. Please save '
+                        'the layer before sharing to Felt.').format(
+                        layer.name())
+                break
+
+        if error:
+            self._fatal_error(error)
+        else:
+            self._validate()
+
     def _workspace_changed(self, workspace_id: str):
         """
         Called when the selected workspace is changed
diff --git a/felt/plugin.py b/felt/plugin.py
index 872aeec..b38e445 100644
--- a/felt/plugin.py
+++ b/felt/plugin.py
@@ -210,20 +210,6 @@ def _create_map_authorized(self,
             self._create_map_dialog.raise_()
             return
 
-        export_layers = layers if layers else \
-            QgsProject.instance().mapLayers().values()
-        for layer in export_layers:
-            support, reason = LayerExporter.can_export_layer(layer)
-            if support == LayerSupport.UnsavedEdits:
-                QMessageBox.warning(
-                    self.iface.mainWindow(),
-                    self.tr('Share to Felt'),
-                    self.tr(
-                        'Layer "{}" has unsaved changes. Please save '
-                        'the layer before sharing to Felt.').format(
-                        layer.name()))
-                return
-
         def _cleanup_dialog(_dialog):
             """
             Remove references to outdated dialogs
diff --git a/felt/ui/create_map.ui b/felt/ui/create_map.ui
index dac5629..1e72402 100644
--- a/felt/ui/create_map.ui
+++ b/felt/ui/create_map.ui
@@ -166,6 +166,26 @@
            </item>
           </layout>
          </widget>
+         <widget class="QWidget" name="page_3">
+          <layout class="QVBoxLayout" name="verticalLayout_4">
+           <item>
+            <widget class="QLabel" name="error_label">
+             <property name="text">
+              <string>TextLabel</string>
+             </property>
+             <property name="wordWrap">
+              <bool>true</bool>
+             </property>
+             <property name="openExternalLinks">
+              <bool>true</bool>
+             </property>
+             <property name="textInteractionFlags">
+              <set>Qt::TextBrowserInteraction</set>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </widget>
         </widget>
        </item>
       </layout>