[Data Explorer] Fix missing field error from taking down the page (#5626

) (#5747)

* Handle missing fields error

---------

Signed-off-by: Ashwin P Chandran <ashwinpc@amazon.com>
(cherry picked from commit 28c1fbb)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/plugins/discover/public/application/components/chart/utils/create_histogram_configs.ts

@@ -25,5 +25,13 @@ export function createHistogramConfigs(
       },
     },
   ];
-  return data.search.aggs.createAggConfigs(indexPattern, visStateAggs);
+
+  // If index pattern is created before the index, this function will fail since the required fields for the histogram agg will be missing.
+  try {
+    return data.search.aggs.createAggConfigs(indexPattern, visStateAggs);
+  } catch (error) {
+    // Just display the error to the user but continue to render the rest of the page
+    data.search.showError(error as Error);
+    return;
+  }
 }