Fatal error: Uncaught EasyRdf\Exception: Failed to parse SPARQL JSON Query Results format in /app/vendor/easyrdf/easyrdf/lib/Sparql/Result.php:412
Stack trace:
#0 /app/vendor/easyrdf/easyrdf/lib/Sparql/Result.php(83): EasyRdf\Sparql\Result->parseJson()
#1 /app/vendor/easyrdf/easyrdf/lib/Sparql/Client.php(392): EasyRdf\Sparql\Result->__construct()
#2 /app/vendor/easyrdf/easyrdf/lib/Sparql/Client.php(255): EasyRdf\Sparql\Client->parseResponseToQuery()
#3 /app/vendor/easyrdf/easyrdf/lib/Sparql/Client.php(128): EasyRdf\Sparql\Client->request()
#4 /app/model/sparql/GenericSparql.php(93): EasyRdf\Sparql\Client->query()
#5 /app/model/sparql/GenericSparql.php(1782): GenericSparql->query()
#6 /app/model/Vocabulary.php(430): GenericSparql->queryTransitiveProperty()
#7 /app/model/Vocabulary.php(565): Vocabulary->getConceptTransitiveBroaders()
#8 /app/controller/WebController.php(186): Vocabulary->getBreadCrumbs()
#9 /app/index.php(87): WebController->invokeVocabularyConcept()
#10 {main}
thrown in /app/vendor/easyrdf/easyrdf/lib/Sparql/Result.php on line 412