Full Text Search Error after Installation NC 21.04.4

I have some problems after updating to NC 21.0.4

initial situation
NC 21.0.4
Full text search
Fulltextsearch Tesseract installed manually because the download link in the app store has not been fixed for several weeks

After I started .occ fulltextsearch: index manually I get an error message

An unhandled exception has been thrown:
TypeError: Argument 2 passed to OCA \ FullTextSearch_Elasticsearch \ Platform \ ElasticSearchPlatform :: getArray () must be of the type array, null given, called in /data/nextcloud/apps/fulltextsearch_elasticsearch/lib/Platform/ElasticSearchPlatform.php on line 317 and defined in /data/nextcloud/apps/fulltextsearch_elasticsearch/vendor/daita/my-small-php-tools/lib/Traits/TArrayTools.php:252
Stack trace:

0 /data/nextcloud/apps/fulltextsearch_elasticsearch/lib/Platform/ElasticSearchPlatform.php(317): OCA \ FullTextSearch_Elasticsearch \ Platform \ ElasticSearchPlatform-> getArray (‘error’, NULL)

1 /data/nextcloud/apps/fulltextsearch_elasticsearch/lib/Platform/ElasticSearchPlatform.php(287): OCA \ FullTextSearch_Elasticsearch \ Platform \ ElasticSearchPlatform-> parseIndexErrorException (Object (Elasticsearch \ Common \ Exceptions \ BadRequest))

2 /data/nextcloud/apps/fulltextsearch_elasticsearch/lib/Platform/ElasticSearchPlatform.php(236): OCA \ FullTextSearch_Elasticsearch \ Platform \ ElasticSearchPlatform-> manageIndexErrorException (Object (OCA \ Files_FullTextSearch \ Model \ FilesDocument) Exceptions \ BadRequest400Exception))

3 /data/nextcloud/apps/fulltextsearch/lib/Service/IndexService.php(375): OCA \ FullTextSearch_Elasticsearch \ Platform \ ElasticSearchPlatform-> indexDocument (Object (OCA \ Files_FullTextSearch \ Model \ FilesDocument))

4 /data/nextcloud/apps/fulltextsearch/lib/Service/IndexService.php(326): OCA \ FullTextSearch \ Service \ IndexService-> indexDocument (Object (OCA \ FullTextSearch_Elasticsearch \ Platform \ ElasticSearchPlatform), Object (OCA \ Files_FullTextSearch \ Model \ FilesDocument))

5 /data/nextcloud/apps/fulltextsearch/lib/Service/IndexService.php(204): OCA \ FullTextSearch \ Service \ IndexService-> indexDocuments (Object (OCA \ FullTextSearch_Elasticsearch \ Platform \ ElasticSearchPlatform), Object (OCA \ Files_FullTextSearch \ Provider \ FilesProvider), Array, Object (OCA \ FullTextSearch \ Model \ IndexOptions))

6 /data/nextcloud/apps/fulltextsearch/lib/Command/Index.php(410): OCA \ FullTextSearch \ Service \ IndexService-> indexProviderContentFromUser (Object (OCA \ FullTextSearch_Elasticsearch \ Platform \ ElasticSearchPlatform), Object (OCA \ Files_FullText \ Search Provider \ FilesProvider), ‘admin’, Object (OCA \ FullTextSearch \ Model \ IndexOptions))

7 /data/nextcloud/apps/fulltextsearch/lib/Command/Index.php(273): OCA \ FullTextSearch \ Command \ Index-> ​​indexProvider (Object (OCA \ Files_FullTextSearch \ Provider \ FilesProvider), Object (OCA \ FullTextSearch \ Model \ IndexOptions))

8 /data/nextcloud/3rdparty/symfony/console/Command/Command.php(255): OCA \ FullTextSearch \ Command \ Index-> ​​execute (Object (Symfony \ Component \ Console \ Input \ ArgvInput), Object (Symfony \ Component \ Console \ Output \ ConsoleOutput))

9 /data/nextcloud/core/Command/Base.php(169): Symfony \ Component \ Console \ Command \ Command-> run (Object (Symfony \ Component \ Console \ Input \ ArgvInput), Object (Symfony \ Component \ Console \ Output \ ConsoleOutput))

10 /data/nextcloud/3rdparty/symfony/console/Application.php(1009): OC \ Core \ Command \ Base-> run (Object (Symfony \ Component \ Console \ Input \ ArgvInput), Object (Symfony \ Component \ Console \ Output \ ConsoleOutput))

11 /data/nextcloud/3rdparty/symfony/console/Application.php(273): Symfony \ Component \ Console \ Application-> doRunCommand (Object (OCA \ FullTextSearch \ Command \ Index), Object (Symfony \ Component \ Console \ Input \ ArgvInput), Object (Symfony \ Component \ Console \ Output \ ConsoleOutput))

12 /data/nextcloud/3rdparty/symfony/console/Application.php(149): Symfony \ Component \ Console \ Application-> doRun (Object (Symfony \ Component \ Console \ Input \ ArgvInput), Object (Symfony \ Component \ Console \ Output \ ConsoleOutput))

13 /data/nextcloud/lib/private/Console/Application.php(215): Symfony \ Component \ Console \ Application-> run (Object (Symfony \ Component \ Console \ Input \ ArgvInput), Object (Symfony \ Component \ Console \ Output \ ConsoleOutput))

14 /data/nextcloud/console.php(100): OC \ Console \ Application-> run ()

15 / data / nextcloud / occ (11): require_once (’/ data / nextcloud …’)

16 {main} root @ f240e613138a: / data / nextcloud

I have already deactivated the group folder, but unfortunately I still get this error message.

I am aware that the full-text search function is not of the “greatest” importance, but is used by a large number of users.

Various error messages are regularly named or the constant wish is expressed that the “result display” is revised once.

Maybe there is still hope that this will happen in the future.

It would be really great, however, if the link could be fixed first and a solution for the above error could be found.

Many Thanks

Django43