general php error while testing current (repo head)

Problem/Motivation

The website encountered an unexpected error. Try again later.

AssertionError: Cannot load the "image_style" entity with NULL ID. in assert() (line 261 of core/lib/Drupal/Core/Entity/EntityStorageBase.php).
Drupal\Core\Entity\EntityStorageBase->load() (Line: 130)
Drupal\metatag_ui_enhancements\Service\MetatagUiEnhancementsService->getImageUrlWithStyle() (Line: 69)
metatag_ui_enhancements_tokens()
call_user_func_array() (Line: 416)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}() (Line: 395)
Drupal\Core\Extension\ModuleHandler->invokeAllWith() (Line: 415)
Drupal\Core\Extension\ModuleHandler->invokeAll() (Line: 364)
Drupal\Core\Utility\Token->generate() (Line: 241)
Drupal\Core\Utility\Token->doReplace() (Line: 191)
Drupal\Core\Utility\Token->replace() (Line: 66)
Drupal\metatag\MetatagToken->replace() (Line: 784)
Drupal\metatag\MetatagManager->processTagValue() (Line: 629)
Drupal\metatag\MetatagManager->generateRawElements() (Line: 61)
Drupal\metatag\Plugin\Field\MetatagEntityFieldItemList::Drupal\metatag\Plugin\Field\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 48)
Drupal\metatag\Plugin\Field\MetatagEntityFieldItemList->computeValue() (Line: 32)
Drupal\metatag\Plugin\Field\MetatagEntityFieldItemList->ensureComputedValue() (Line: 114)
Drupal\metatag\Plugin\Field\MetatagEntityFieldItemList->isEmpty() (Line: 162)
Drupal\Core\TypedData\Validation\RecursiveContextualValidator->validateNode() (Line: 164)
Drupal\Core\TypedData\Validation\RecursiveContextualValidator->validateNode() (Line: 106)
Drupal\Core\TypedData\Validation\RecursiveContextualValidator->validate() (Line: 93)
Drupal\Core\TypedData\Validation\RecursiveValidator->validate() (Line: 132)
Drupal\Core\TypedData\TypedData->validate() (Line: 518)
Drupal\Core\Entity\ContentEntityBase->validate() (Line: 188)
Drupal\Core\Entity\ContentEntityForm->validateForm()
call_user_func_array() (Line: 82)
Drupal\Core\Form\FormValidator->executeValidateHandlers() (Line: 274)
Drupal\Core\Form\FormValidator->doValidateForm() (Line: 118)
Drupal\Core\Form\FormValidator->validateForm() (Line: 593)
Drupal\Core\Form\FormBuilder->processForm() (Line: 326)
Drupal\Core\Form\FormBuilder->buildForm() (Line: 73)
Drupal\Core\Controller\FormController->getContentResult() (Line: 39)
Drupal\layout_builder\Controller\LayoutBuilderHtmlEntityFormController->getContentResult()
call_user_func_array() (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 741)
Drupal\Core\DrupalKernel->handle() (Line: 19)

Steps to reproduce

enable this module, see exiting node type with meta field now has media field.
attempt to select and save. this error is seen.

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes