I started looking at Mailer in order to set up renewal reminders and this message appears on the Groups tab against the option Applies to orders invoiced to:
Missing type def. for param-type xml:business_consumer
In our situation business/consumer does not apply as there is no tax involved (the Tax module is installed just to enable Mailer to be used), but I'd still like to get this fixed as I have no idea what effect this error would have.