message: Use WarningPanel
diff: @@ -31,9 +31,9 @@ import {
  InfoCard,
  Progress,
  useApi,
  + WarningPanel,
  } from '@backstage/core';
  import { Box, Typography } from '@material-ui/core';
  -import { Alert } from '@material-ui/lab';
  import ZoomOutMap from '@material-ui/icons/ZoomOutMap';
  import React from 'react';
  import { useAsync } from 'react-use';
  @@ -138,7 +138,11 @@ export function SystemDiagramCard() {
  if (loading) {
  return <Progress />;
  } else if (error) {
  - return <Alert severity="error">{error.message}</Alert>;
  + return (
  + <WarningPanel severity="error" title="Could not load system diagram">
  + {error.message}
  + </WarningPanel>
  + );
  }
  return (
  