NextGEN Gallery Plugin Not found

{"id":30,"count":6,"description":"","link":"http:\/\/ruth.tshin.com\/tag\/bangkok\/","name":"Bangkok","slug":"bangkok","taxonomy":"post_tag","meta":[],"_links":{"self":[{"href":"http:\/\/ruth.tshin.com\/wp-json\/wp\/v2\/tags\/30"}],"collection":[{"href":"http:\/\/ruth.tshin.com\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"http:\/\/ruth.tshin.com\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"http:\/\/ruth.tshin.com\/wp-json\/wp\/v2\/posts?tags=30"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}