Caldera forms custom processor stuck

I have a Caldera form which should be processed on submit to my node.js server that sends a request to an API. The server works fine as long as it get’s a request in the right data format (json, checked via postman). For the purpose of sending the form data to the server I created a plugin as described in the following documentation: https://calderaforms.com/doc/getting-submission-data-in-a-form-processor/
In the first attempt the php code of the plugin wasn’t working so i tried to change it. But ever since Caldera keeps taking the very first code of my “send”-plugin. Even if i delete the Caldera plugin and my own plugin, reinstall caldera and import the form without adding my plugin and with no processor in the form at all it still sends a request to my server. I’ve tried to disable opcache on my hosting server and disactivated wordfence which didn’t make a difference. It just ignores everything I do.
I’m really starting to freak out.. does anybody have experience with that kind of thing or any idea where the problem could lay?
Thanks a lot.