It looks like that field must be of type "number" and be limited to one value like you see in the image above. The "number of values" fieldset should be on the content type's manage fields page, e.g. "admin/structure/types/manage/<content-type>/fields/<field-of-type-mailchimp-subscription>".
I would check the manage field page to make sure it is set to one for the number of values allowed.
Well your second Idea seems to have done the trick!
So Simple!!!!! I can use this all over the place!!!
Big Hug, and Thanks a Million, @yorkshirepudding !!!
Posted2 days 1 hour ago by Francis Greaves (themetman) on:
Hi Francis. I can try to help. First things first, is your custom code that adds these files to your server telling Backdrop about them so they become managed files? That would be needed to do a...
Posted2 days 1 hour ago by Martin Price (yorkshirepudding) on:
Comments
The specific error you are seeing comes from https://github.com/backdrop-contrib/mailchimp/blob/1b970f66c112e88d2ccfe....
It looks like that field must be of type "number" and be limited to one value like you see in the image above. The "number of values" fieldset should be on the content type's manage fields page, e.g. "admin/structure/types/manage/<content-type>/fields/<field-of-type-mailchimp-subscription>".
I would check the manage field page to make sure it is set to one for the number of values allowed.