Why does the $injector:cdep Circular Dependency error occur?

Question

Angular

There is a service for issuing messages:

angular.module('Notes',['ui.bootstrap']);
         
angular
   .module('Notes')
   .service('Srv', Srv);
   Srv.$inject = ['$uibModal'];
function Srv ($uibModal) {
  this.say = function(msg) {
  ...
}
return this;
}

When called from any controller, everything works:

angular
   .module('app')
   .controller('PCC' , PCC);
PCC.$inject = ['Srv'];
function PCC(Srv) {		
      Srv.say('message');
}

When trying to inject a service into an Interceptor:

angular
.module('app', ['ngResource', 'Notes'])

Interceptor = angular.module('app')
 .factory('Interceptor',['Srv',function(Srv)
 { 	var Interceptor = {
    'response': function(response) {
      	Srv.say('message');
    }
  }
  return Interceptor;
}]);

angular
.module('app')
.config(['$httpProvider',
function($httpProvider) {
    $httpProvider.interceptors.push('Interceptor');
}]);

$injector:cdep Circular Dependency error occurs.
Tell me, please, what is the problem?