Empty notification email

Problem/Motivation

Following either a move to a new server or updating to the latest version of Webform for Drupal 7, I've found that the notification emails appear blank, showing none of the user input, or other data like date and time in which the submission was posted. In addition, the status report page gives me this information:

Token types are not defined but have tokens

$info['types']['node']
$info['types']['term']
$info['types']['vocabulary']
$info['types']['file']
$info['types']['user']
$info['types']['current-user']

Warning
Tokens or token types missing name property

$info['types']['date']
$info['tokens']['node']['url']
$info['tokens']['file']['size']
$info['tokens']['user']['url']
$info['tokens']['date']['custom']

Steps to reproduce

This issue can be seen when one submits an entry in a webform.