Problem with Domain Reselling in Domain Mapping

I'm trying to get the domain reseller feature set up in the Domain Mapping plugin. I'm using Enom. I finally got everything set up where I'm not getting any errors from Enom. They've added my IP address and everything. So I tried the process of checking domain availability and that worked fine. When I tried to purchase it, it just takes me to a blank white page with only this text on it:

Are you sure you want to do this?
Please try again.

The URL of the page is:
https://mysite.com/subsitename/wp-admin/admin-ajax.php?action=domainmapping_show_purchase_form&nonce=1ed90b0e74&tld=com&blog=128&success=http%3A%2F%2Fmysitecom%2Fsubsitename%2Fwp-admin%2Ftools.php%3Fpage%3Ddomainmapping&cancel=http%3A%2F%2Fmysite.com%2Fsubsitename%2Fsubsitename%2Fwp-admin%2Fms-delete-site.php%3Fpage%3Ddomainmapping%26tab%3Dpurchase%26sld%3Dthenewdomain%26tld%3Dcom

The link for "Please try again" is:
http://mysite.com/subsitename/wp-admin/ms-delete-site.php?page=domainmapping&tab=purchase

I have attached a screenshot of the reseller API log. Everything is showing green with no errors.

Please help!