Handle empty mylink response at startup (#46241)

homeassistant/components/somfy_mylink/__init__.py

@@ -108,6 +108,9 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
         )
         return False
 
+    if "result" not in mylink_status:
+        raise ConfigEntryNotReady("The Somfy MyLink device returned an empty result")
+
     _async_migrate_entity_config(hass, entry, mylink_status)
 
     undo_listener = entry.add_update_listener(_async_update_listener)