Hi @lkamms
Sounds like you have upgraded from ACF v3.x to v4.x
This transition introduced a new way to create field types. v3 field types are no longer compatible with v4 (this is heavily documented).
I believe that your website contains a ‘buy now’ field type which was built from v3, but not for v4.
My advice would be to contact the dev team from the build and ask them if this is the case. If so, I would hire them to rebuild the field into a v4 compatible version. This is a pretty simple task as there is a starter kit available on github and documentation on the resources page.
Hope that helps.
Thanks
E
