fix #6275

electrum/gui/kivy/main_window.py

@@ -715,6 +715,9 @@ class ElectrumWindow(App):
         self._settings_dialog.open()
 
     def lightning_open_channel_dialog(self):
+        if not self.wallet.has_lightning():
+            self.show_error(_('Lightning is not enabled for this wallet'))
+            return
         d = LightningOpenChannelDialog(self)
         d.open()
 

electrum/gui/kivy/uix/dialogs/lightning_channels.py

@@ -63,6 +63,7 @@ Builder.load_string(r'''
 <LightningChannelsDialog@Popup>:
     name: 'lightning_channels'
     title: _('Lightning channels.')
+    has_lightning: False
     can_send: ''
     can_receive: ''
     id: popup
@@ -94,6 +95,7 @@ Builder.load_string(r'''
                 size_hint: 0.3, None
                 height: '48dp'
                 text: _('New...')
+                disabled: not root.has_lightning
                 on_release: popup.app.popup_dialog('lightning_open_channel_dialog')
 
 
@@ -409,7 +411,7 @@ class LightningChannelsDialog(Factory.Popup):
         super(LightningChannelsDialog, self).__init__()
         self.clocks = []
         self.app = app
-        self.can_send = ''
+        self.has_lightning = app.wallet.has_lightning()
         self.update()
 
     def show_item(self, obj):