Warning: Undefined array key "offset"

Problem/Motivation

I am getting the following warning when viewing the table.

Warning: Undefined array key "offset" in Drupal\views_aggregator\Plugin\views\style\Table->preRender() (line 355 of modules/contrib/views_aggregator/src/Plugin/views/style/Table.php).
Drupal\views_aggregator\Plugin\views\style\Table->preRender() (Line: 1568)