D9 in PHP 7.3.10

Does anyone have Data up-and-running in D9.0.7 - php 7.3.10 (or there abouts)

Problem/Motivation

Been working my way through the patches, and I have the table create form up. (data search is still turned off, it seems to need more work)

Steps to reproduce

When I attempt to create an entry I can get through the create form, to the field entry form. Once I hit save on the fields, I end up with a white screen.

The website encountered an unexpected error. Please try again later.
Error: Call to a member function addError() on null in Drupal\data\Form\TableConfigForm->save() (line 129 of modules/contrib_no_composer/data/src/Form/TableConfigForm.php).

Also seeing a php error in php-storm for:
TableConfigForm.php ( Uniform variable syntax is available in PHP 7 only - referencing $data_table_config->EntityInterface::toUrl() )

$form_state->setRedirectUrl($data_table_config->EntityInterface::toUrl()('collection'));

Some of the patches don't really seems to be applying correctly, soo... I thought I would backup and establish expectations for current status?