"Field entity_id_webform_submission is unknown" when saving webforms on block

Problem/Motivation

I've followed the steps outlined in the Placing webforms as block video tutorial, and I'm getting the following message when submitting the block form.

I have also tried the Webform Demo: Application/Evaluation System, on a fresh install with the same result.

Drupal\Core\Entity\EntityStorageException: Field entity_id_webform_submission is unknown. in Drupal\Core\Entity\Sql\SqlContentEntityStorage->save()

Drupal 9.4.5 & Webform 6.1.3 & php 7.4 , 8.1

Steps to reproduce

Install Webform Demo: Application/Evaluation System
Go to Demo Application form, complete the field and submit the form.
Go to the submission, view the recent submission, complete the Evaluation form and submit.