Examples of word unexpected

Fatal error: Uncaught exception 'Exception' with message 'Can't connect to the api: http://api.wordnik.com/v4/word.json/unexpected/examples response code: 500' in /home/eli8manajr/englishtohindi/wordnik/Swagger.php:116 Stack trace: #0 /home/eli8manajr/englishtohindi/wordnik/WordApi.php(70): APIClient->callAPI('/word.json/unex...', 'GET', Array, NULL, Array) #1 /home/eli8manajr/englishtohindi/index.php(242): WordApi->getExamples('unexpected', NULL, NULL, NULL) #2 {main} thrown in /home/eli8manajr/englishtohindi/wordnik/Swagger.php on line 116