"Unable to replace placeholders for the profile"

Hi,

Had this come through this morning for all of our recurring invoices:-

"The invoice for XXXX has been created and it's saved as a draft in your Zoho Invoice account. However, some of the placeholders used on your invoice template were not replaced with the appropriate information. Please check this before you send the invoice to your customer.

The placeholders which were not replaced are listed below:

%CustomerBState%

Here’s an overview of the invoice for your reference:

Can someone please explain what this means and what we need to do? The invoice /looks/ like it has been created ok but not sure what the variable above means, and how to check it.

Thanks

Mark