Simple schema is accepting null values in required fields

Simple Schema is accepting and inserting null into required fields. Shouldn’t it error? Can someone please point out what I’m doing wrong here.
I’m using these packages.

  • mdg:validated-method
  • mdg:validation-error
  • simpl-schema

Simple Schema

export const ProfileCandidate = new Mongo.Collection('profileCandidate');

const profileCandidate = new SimpleSchema({
  name: Object,
    'name.first': String,
    'name.last': String,
  }
});

Method Call

var data = {
  'name.first': this.state.firstName,
  'name.last': this.state.lastName,
};

insertProfileCandidate.call(data, (err, res) => {
  if(err) {
    console.log("err: ", err);
  }
});

ValidateMethod

export const insertProfileCandidate = new ValidatedMethod({
  name: 'profileCandidate.insert',
  
  validate: new SimpleSchema({
    'name.first': { type: String, min: 1 },
    'name.last': { type: String, min: 1 },
  }).validator({ clean: true }),
  
  run(data) {
    ProfileCandidate.insert({
      name: {
        first: data['name.first'],
        last: data['name.last'],
      }
    }, (error, result) => {
      if (error) throw new Meteor.Error('400', error.invalidKeys);
    });
  }
});

OK, it appears as though I needed to also install collection2-core