Custom Form action on submit

I have a relatively simple (I thought) task.
When a form is submitted I need to call a plugin file, arrange $_POST entries into a text variable, and email it to a specific address.

Tried using Webhooks, but the call isn’t working.

Is there something I’m missing?

TIA
Ed

I’d recommend opening a support ticket for this issue:

https://www.gravityforms.com/open-support-ticket/

Or, if the Webhooks add-on is not working for you, I recommend coding something yourself using the gform_after_submission hook.