AngularJs错误http://errors.angularjs.org/1.2.9/$injector/unpr?p0=...

Error: [$injector:unpr] http://errors.angularjs.org/1.2.9/$injector/unpr?p0=contentCategoryServiceProvider%20%3C-%20contentCategoryService
F/<@http://localhost:9101/plugins/angularjs/angular.min.js:2:449
$b/l.$injector<@http://localhost:9101/plugins/angularjs/angular.min.js:28:125
c@http://localhost:9101/plugins/angularjs/angular.min.js:26:200
$b/p.$injector<@http://localhost:9101/plugins/angularjs/angular.min.js:28:191
c@http://localhost:9101/plugins/angularjs/angular.min.js:26:200
d@http://localhost:9101/plugins/angularjs/angular.min.js:26:417
instantiate@http://localhost:9101/plugins/angularjs/angular.min.js:27:80
jd/this.$get</<@http://localhost:9101/plugins/angularjs/angular.min.js:57:484
E/<@http://localhost:9101/plugins/angularjs/angular.min.js:45:14
q@http://localhost:9101/plugins/angularjs/angular.min.js:3:378
E@http://localhost:9101/plugins/angularjs/angular.min.js:44:382
f@http://localhost:9101/plugins/angularjs/angular.min.js:38:399
v/<@http://localhost:9101/plugins/angularjs/angular.min.js:38:67
c/</<@http://localhost:9101/plugins/angularjs/angular.min.js:14:63
$eval@http://localhost:9101/plugins/angularjs/angular.min.js:98:304
$apply@http://localhost:9101/plugins/angularjs/angular.min.js:99:43
c/<@http://localhost:9101/plugins/angularjs/angular.min.js:14:21
d@http://localhost:9101/plugins/angularjs/angular.min.js:26:450
c@http://localhost:9101/plugins/angularjs/angular.min.js:13:437
Zb@http://localhost:9101/plugins/angularjs/angular.min.js:14:140
Tc@http://localhost:9101/plugins/angularjs/angular.min.js:13:215
@http://localhost:9101/plugins/angularjs/angular.min.js:197:117
i@http://localhost:9101/plugins/jQuery/jquery-2.2.3.min.js:2:27146
fireWith@http://localhost:9101/plugins/jQuery/jquery-2.2.3.min.js:2:27914
ready@http://localhost:9101/plugins/jQuery/jquery-2.2.3.min.js:2:29705
J@http://localhost:9101/plugins/jQuery/jquery-2.2.3.min.js:2:29890
angular.min.js:80:296