TypeError: Return value of OCA\FullTextSearch\Model\SearchRequest::getProviders() must be of the type array, null returned in /var/www/nextcloud/apps/fulltextsearch/lib/Model/SearchRequest.php:114

[CharlesCage]

On executing fulltextsearch:test:

.Testing your current setup:  
Creating mocked content provider. ok  
Testing mocked provider: get indexable documents. (2 items) ok  
Loading search platform. (Elasticsearch) ok  
Testing search platform. ok  
Locking process ok  
Removing test. ok  
Pausing 3 seconds 1 2 3 ok  
Initializing index mapping. ok  
Indexing generated documents. ok  
Pausing 3 seconds 1 2 3 ok  
Retreiving content from a big index (license). (size: 32386) ok  
Comparing document with source. ok  
Searching basic keywords:  
 - 'test' An unhandled exception has been thrown:
TypeError: Return value of OCA\FullTextSearch\Model\SearchRequest::getProviders() must be of the type array, null returned in /var/www/nextcloud/apps/fulltextsearch/lib/Model/SearchRequest.php:114
Stack trace:
#0 /var/www/nextcloud/apps/fulltextsearch/lib/Model/SearchRequest.php(700): OCA\FullTextSearch\Model\SearchRequest->getProviders()
#1 [internal function]: OCA\FullTextSearch\Model\SearchRequest->jsonSerialize()
#2 /var/www/nextcloud/apps/fulltextsearch_elasticsearch/lib/Service/SearchService.php(103): json_encode(Object(OCA\FullTextSearch\Model\SearchRequest))
#3 /var/www/nextcloud/apps/fulltextsearch_elasticsearch/lib/Platform/ElasticSearchPlatform.php(336): OCA\FullTextSearch_ElasticSearch\Service\SearchService->searchRequest(Object(Elasticsearch\Client), Object(OCA\FullTextSearch\Model\SearchResult), Object(OC\FullTextSearch\Model\DocumentAccess))
#4 /var/www/nextcloud/apps/fulltextsearch/lib/Command/Test.php(584): OCA\FullTextSearch_ElasticSearch\Platform\ElasticSearchPlatform->searchRequest(Object(OCA\FullTextSearch\Model\SearchResult), Object(OC\FullTextSearch\Model\DocumentAccess))
#5 /var/www/nextcloud/apps/fulltextsearch/lib/Command/Test.php(436): OCA\FullTextSearch\Command\Test->search(Object(Symfony\Component\Console\Output\ConsoleOutput), Object(OCA\FullTextSearch_ElasticSearch\Platform\ElasticSearchPlatform), Object(OCA\FullTextSearch\Provider\TestProvider), Object(OC\FullTextSearch\Model\DocumentAccess), 'test', Array)
#6 /var/www/nextcloud/apps/fulltextsearch/lib/Command/Test.php(171): OCA\FullTextSearch\Command\Test->testSearchSimple(Object(Symfony\Component\Console\Output\ConsoleOutput), Object(OCA\FullTextSearch_ElasticSearch\Platform\ElasticSearchPlatform), Object(OCA\FullTextSearch\Provider\TestProvider))
#7 /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php(255): OCA\FullTextSearch\Command\Test->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#8 /var/www/nextcloud/core/Command/Base.php(168): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#9 /var/www/nextcloud/3rdparty/symfony/console/Application.php(915): OC\Core\Command\Base->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#10 /var/www/nextcloud/3rdparty/symfony/console/Application.php(272): Symfony\Component\Console\Application->doRunCommand(Object(OCA\FullTextSearch\Command\Test), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#11 /var/www/nextcloud/3rdparty/symfony/console/Application.php(148): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#12 /var/www/nextcloud/lib/private/Console/Application.php(214): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#13 /var/www/nextcloud/console.php(99): OC\Console\Application->run()
#14 /var/www/nextcloud/occ(11): require_once('/var/www/nextcl...')
#15 {main}

[CharlesCage]

This is an issue with Fulltextsearch_Elasticsearch, and patch is currently awaiting review.