Aggregation field breaks output report.
I'm getting an error when adding an aggregate field (sum) to the dataset. The reports spits out the error below:
Notice: Undefined index: sum in Civi\DataProcessor\FieldOutputHandler\AggregateFunctionFieldOutputHandler->formatField() (line 59 of drupal/sites/default/files/civicrm/ext/dataprocessor/Civi/DataProcessor/FieldOutputHandler/AggregateFunctionFieldOutputHandler.php).
Notice: Undefined index: sum in Civi\DataProcessor\FieldOutputHandler\AggregateFunctionFieldOutputHandler->formatField() (line 71 of drupal/sites/default/files/civicrm/ext/dataprocessor/Civi/DataProcessor/FieldOutputHandler/AggregateFunctionFieldOutputHandler.php).