Error when indexing location fields using Search API

Problem/Motivation

After updating from 8.x-1.9 to 8.x-1.11 (and updating commerce-guys/addressing) the following error is logged every time we try indexing content that has an address field:

[error] TypeError: CommerceGuys\Addressing\Locale::match(): Argument #2 ($secondLocale) must be of type string, null given, called in /var/www/html/web/modules/contrib/address/src/TypedData/SubdivisionName.php on line 132 in CommerceGuys\Addressing\Locale::match() (line 241 of /var/www/html/vendor/commerceguys/addressing/src/Locale.php) #0 /var/www/html/web/modules/contrib/address/src/TypedData/SubdivisionName.php(132): CommerceGuys\Addressing\Locale::match('en', NULL)
#1 /var/www/html/web/modules/contrib/address/src/TypedData/SubdivisionName.php(68): Drupal\address\TypedData\SubdivisionName->resolveAddressName('administrative_...', Object(Drupal\address\Plugin\Field\FieldType\AddressItem))
#2 /var/www/html/web/modules/contrib/search_api/src/Utility/FieldsHelper.php(210): Drupal\address\TypedData\SubdivisionName->getValue()
#3 /var/www/html/web/modules/contrib/search_api/src/Utility/FieldsHelper.php(176): Drupal\search_api\Utility\FieldsHelper->extractFieldValues(Object(Drupal\address\TypedData\SubdivisionName))
#4 /var/www/html/web/modules/contrib/search_api/src/Utility/FieldsHelper.php(144): Drupal\search_api\Utility\FieldsHelper->extractField(Object(Drupal\address\TypedData\SubdivisionName), Object(Drupal\search_api\Item\Field))
#5 /var/www/html/web/modules/contrib/search_api/src/Utility/FieldsHelper.php(165): Drupal\search_api\Utility\FieldsHelper->extractFields(Object(Drupal\address\Plugin\Field\FieldType\AddressItem), Array, 'en')
#6 /var/www/html/web/modules/contrib/search_api/src/Item/Item.php(276): Drupal\search_api\Utility\FieldsHelper->extractFields(Object(Drupal\Core\Entity\Plugin\DataType\EntityAdapter), Array, 'en')
#7 /var/www/html/web/modules/contrib/search_api/src/Plugin/search_api/processor/RenderedItem.php(256): Drupal\search_api\Item\Item->getFields()
#8 /var/www/html/web/modules/contrib/search_api/src/Item/Item.php(282): Drupal\search_api\Plugin\search_api\processor\RenderedItem->addFieldValues(Object(Drupal\search_api\Item\Item))
#9 /var/www/html/web/modules/contrib/search_api/src/Entity/Index.php(976): Drupal\search_api\Item\Item->getFields()
#10 /var/www/html/web/modules/contrib/search_api/src/Entity/Index.php(930): Drupal\search_api\Entity\Index->indexSpecificItems(Array)
#11 /var/www/html/web/modules/contrib/search_api/src/IndexBatchHelper.php(154): Drupal\search_api\Entity\Index->indexItems(50)
#12 /var/www/html/vendor/drush/drush/includes/batch.inc(256): Drupal\search_api\IndexBatchHelper::process(Object(Drupal\search_api\Entity\Index), 50, 6327, Object(DrushBatchContext))
#13 /var/www/html/vendor/drush/drush/includes/batch.inc(201): _drush_batch_worker()
#14 /var/www/html/vendor/drush/drush/includes/batch.inc(95): _drush_batch_command('3')
#15 /var/www/html/vendor/drush/drush/src/Drupal/Commands/core/BatchCommands.php(20): drush_batch_command('3')
#16 [internal function]: Drush\Drupal\Commands\core\BatchCommands->process('3', Array)
#17 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(257): call_user_func_array(Array, Array)
#18 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(212): Consolidation\AnnotatedCommand\CommandProcessor->runCommandCallback(Array, Object(Consolidation\AnnotatedCommand\CommandData))
#19 /var/www/html/vendor/consolidation/annotated-command/src/CommandProcessor.php(176): Consolidation\AnnotatedCommand\CommandProcessor->validateRunAndAlter(Array, Array, Object(Consolidation\AnnotatedCommand\CommandData))
#20 /var/www/html/vendor/consolidation/annotated-command/src/AnnotatedCommand.php(350): Consolidation\AnnotatedCommand\CommandProcessor->process(Object(Symfony\Component\Console\Output\ConsoleOutput), Array, Array, Object(Consolidation\AnnotatedCommand\CommandData))
#21 /var/www/html/vendor/symfony/console/Command/Command.php(255): Consolidation\AnnotatedCommand\AnnotatedCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#22 /var/www/html/vendor/symfony/console/Application.php(1027): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#23 /var/www/html/vendor/symfony/console/Application.php(273): Symfony\Component\Console\Application->doRunCommand(Object(Consolidation\AnnotatedCommand\AnnotatedCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#24 /var/www/html/vendor/symfony/console/Application.php(149): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#25 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(124): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#26 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(51): Drush\Runtime\Runtime->doRun(Array, Object(Symfony\Component\Console\Output\ConsoleOutput))
#27 /var/www/html/vendor/drush/drush/drush.php(72): Drush\Runtime\Runtime->run(Array)
#28 /var/www/html/vendor/drush/drush/drush(4): require('/var/www/html/v...')
#29 /var/www/html/vendor/bin/drush(120): include('/var/www/html/v...')
#30 {main}.

Prior to updating the content would index correctly.

Steps to reproduce

* Add a location field to a content type.
* Add the location field to the search_api index's fields configuration.
* Try indexing the content.

Proposed resolution

Fix the bug.

Remaining tasks

Fix the bug.

User interface changes

TBD

API changes

TBD

Data model changes

TBD