diff --git a/homeassistant/components/cloud/__init__.py b/homeassistant/components/cloud/__init__.py
index 1ad76c3d7aa..d4d443a692d 100644
--- a/homeassistant/components/cloud/__init__.py
+++ b/homeassistant/components/cloud/__init__.py
@@ -122,6 +122,9 @@ def async_remote_ui_url(hass) -> str:
     if not async_is_logged_in(hass):
         raise CloudNotAvailable
 
+    if not hass.data[DOMAIN].remote.instance_domain:
+        raise CloudNotAvailable
+
     return "https://" + hass.data[DOMAIN].remote.instance_domain