Exception being thrown when attempting to login with Meteor user accounts using username and password only

I’m trying to setup a login system where the user registers and logs in with only username and password.

Here’s the error it throws upon registration:

Exception in delivering result of invoking 'ATCreateUserServer': TypeError: Cannot read property 'setError' of undefined

Here’s the relevant code:

Accounts.js (located in client/account):

AccountsTemplates.configure({
	focusFirstInput: true,
	showForgotPasswordLink: false,
	showLabels: false,
  texts: {
    title: {
      changePwd: "Password Title",
      enrollAccount: "Enroll Title",
      forgotPwd: "Forgot Pwd Title",
      resetPwd: "Reset Pwd Title",
      signIn: "Sign In To Writeit",
      signUp: "Sign Up Title",
      verifyEmail: "Verify Email Title",
    }
  }
});

AccountsTemplates.removeField('email');
var pwd = AccountsTemplates.removeField('password');

AccountsTemplates.addFields([
  {
      _id: "username",
      type: "text",
      displayName: "username",
      required: true,
      minLength: 5,
  },
  pwd
]);

Packages:

# Meteor packages used by this project, one per line.
# Check this file (and the other files in this directory) into your repository.
#
# 'meteor add' and 'meteor remove' will edit this file for you,
# but you can also edit it by hand.

meteor-base             # Packages every Meteor app needs to have
mobile-experience       # Packages for a great mobile UX
mongo                   # The database Meteor supports right now
blaze-html-templates    # Compile .html files into Meteor Blaze views
reactive-var            # Reactive variable for tracker
jquery                  # Helpful client-side library
tracker                 # Meteor's client-side reactive programming library

standard-minifier-css   # CSS minifier run for production mode
standard-minifier-js    # JS minifier run for production mode
es5-shim                # ECMAScript 5 compatibility for older browsers.
ecmascript              # Enable ECMAScript2015+ syntax in app code
session

#design
#twbs:bootstrap
fezvrasta:bootstrap-material-design

#debugging 
meteortoys:allthings

#accounts
accounts-base
accounts-password
service-configuration
useraccounts:core
useraccounts:bootstrap

#router
kadira:flow-router
kadira:blaze-layout

#validation/schema
aldeed:simple-schema
aldeed:collection2
check

Thanks in advanced for the help!