search_api_ai gives field value, returning in error (cron stuck)

Problem/Motivation

| 2024-07-10T06:25:56.053153400Z NOTICE: PHP message: ValueError: DOMDocument::loadHTML(): Argument #1 ($source) must not be empty in /var/www/html/web/modules/contrib/openai/src/Utility/StringHelper.php on line 66 #0 /var/www/html/web/modules/contrib/openai/src/Utility/StringHelper.php(66): DOMDocument->loadHTML() | 2024-07-10T06:25:56.053446600Z #1 /var/www/html/web/modules/contrib/search_api_ai/src/Plugin/search_api/data_type/Embeddings.php(58): Drupal\openai\Utility\StringHelper::prepareText() | 2024-07-10T06:25:56.053474000Z #2 /var/www/html/web/modules/contrib/search_api/src/Item/Field.php(568): Drupal\search_api_ai\Plugin\search_api\data_type\Embeddings->getValue() | 2024-07-10T06:25:56.054575100Z #3 /var/www/html/web/modules/contrib/search_api/src/Utility/FieldsHelper.php(189): Drupal\search_api\Item\Field->addValue() | 2024-07-10T06:25:56.054676200Z #4 /var/www/html/web/modules/contrib/search_api/src/Utility/FieldsHelper.php(148): Drupal\search_api\Utility\FieldsHelper->extractField() | 2024-07-10T06:25:56.054707600Z #5 /var/www/html/web/modules/contrib/search_api/src/Item/Item.php(275): Drupal\search_api\Utility\FieldsHelper->extractFields() | 2024-07-10T06:25:56.054735400Z #6 /var/www/html/web/modules/contrib/search_api/src/Plugin/search_api/processor/RenderedItem.php(180): Drupal\search_api\Item\Item->getFields() | 2024-07-10T06:25:56.054761900Z #7 /var/www/html/web/modules/contrib/search_api/src/Item/Item.php(281): Drupal\search_api\Plugin\search_api\processor\RenderedItem->addFieldValues() | 2024-07-10T06:25:56.054792800Z #8 /var/www/html/web/modules/contrib/search_api/src/Entity/Index.php(987): Drupal\search_api\Item\Item->getFields() | 2024-07-10T06:25:56.054819800Z #9 /var/www/html/web/modules/contrib/search_api/src/Entity/Index.php(935): Drupal\search_api\Entity\Index->indexSpecificItems() | 2024-07-10T06:25:56.054844600Z #10 /var/www/html/web/modules/contrib/search_api/search_api.module(117): Drupal\search_api\Entity\Index->indexItems() | 2024-07-10T06:25:56.054869500Z #11 /var/www/html/web/core/lib/Drupal/Core/Cron.php(335): search_api_cron() | 2024-07-10T06:25:56.054896100Z #12 /var/www/html/web/core/lib/Drupal/Core/Extension/ModuleHandler.php(395): Drupal\Core\Cron->Drupal\Core\{closure}() | 2024-07-10T06:25:56.054914700Z #13 /var/www/html/web/core/lib/Drupal/Core/Cron.php(318): Drupal\Core\Extension\ModuleHandler->invokeAllWith() | 2024-07-10T06:25:56.054941600Z #14 /var/www/html/web/core/lib/Drupal/Core/Cron.php(159): Drupal\Core\Cron->invokeCronHandlers() | 2024-07-10T06:25:56.054974000Z #15 /var/www/html/web/core/lib/Drupal/Core/ProxyClass/Cron.php(75): Drupal\Core\Cron->run() | 2024-07-10T06:25:56.055000000Z #16 /var/www/html/web/core/modules/automated_cron/src/EventSubscriber/AutomatedCron.php(65): Drupal\Core\ProxyClass\Cron->run() | 2024-07-10T06:25:56.056011000Z #17 [internal function]: Drupal\automated_cron\EventSubscriber\AutomatedCron->onTerminate() | 2024-07-10T06:25:56.056093600Z #18 /var/www/html/web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): call_user_func() | 2024-07-10T06:25:56.056128100Z #19 /var/www/html/vendor/symfony/http-kernel/HttpKernel.php(115): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() | 2024-07-10T06:25:56.056210700Z #20 /var/www/html/web/core/lib/Drupal/Core/StackMiddleware/StackedHttpKernel.php(66): Symfony\Component\HttpKernel\HttpKernel->terminate() | 2024-07-10T06:25:56.056237000Z #21 /var/www/html/web/core/lib/Drupal/Core/DrupalKernel.php(715): Drupal\Core\StackMiddleware\StackedHttpKernel->terminate() | 2024-07-10T06:25:56.056342500Z #22 /var/www/html/web/index.php(22): Drupal\Core\DrupalKernel->terminate() | 2024-07-10T06:25:56.056508100Z #23 {main} | 2024-07-10T06:25:56.056555400Z 172.19.0.5 - 10/Jul/2024:06:25

Steps to reproduce

"drupal/openai": "1.0.x-dev@dev",
"drupal/search_api": "^1.29",
"drupal/search_api_ai": "^1.0@alpha",

in search_api
I added
-> the rendered node
-> the title field
-> a tags field
-> the body field (as embeddings) to the search.

Proposed resolution

not sure yet, just logging to see if I'm the only one.

Remaining tasks

User interface changes

API changes

Data model changes