No worries, Make is formerly known as Integromat, It seems the only way to test is to redetermine the datastructure, other than that it doesn’t seem to have a test connection feature.
Everything seems to connect properly as Make accepts all fields sent by Forminator, however it also seems to send a ?“upload_1: file file_url“ link with a null value inside of it
Here’s an image of the setup if it helps
https://imgur.com/a/YkdSQKX