Just use debug instead of error if the binary_sensor does not get data (#17720)

homeassistant/components/openuv/__init__.py

@@ -210,7 +210,7 @@ class OpenUV:
             if data.get('from_time') and data.get('to_time'):
                 self.data[DATA_PROTECTION_WINDOW] = data
             else:
-                _LOGGER.error(
+                _LOGGER.debug(
                     'No valid protection window data for this location')
                 self.data[DATA_PROTECTION_WINDOW] = {}