CURLRequest multipart File - nothing send

No, the PHP 7.4 thing are with Codeigniter. I got it to work in PHP 7.3.12 with just calling cURL myself. But with no method I where able to add an file. So I don't know if webhook.site can take attachments or I'm sending it incorrectly.

Okay, if you use just a normal html form it works fine on the webhook testsite. see here: https://webhook.site/#!/d24f29a8-2146-45cd-a67a-214109b33b25/5f034f01-a4c7-455d-9440-eab2f70f3f51/1

Will be using curl without CI4 for now, thanks for the help. Happy i din't make some mistake in my coding, but it would be easier to fix