EvoCalculator/src/client/Components/Spinner.jsx

import { Box, Flex } from 'client/UIKit/grid';
import { Spin } from 'antd';

export default () => (
  <Box height="100%" py="10px">
    <Flex justifyContent="center" alignItems="center">
      <Spin />
    </Flex>
  </Box>
);