Silent Remote Sending not working after changing url

Hi everyone!
I’m really in love with this plugin and it has worked fine until i decided to post form fields to a different URL.

First it was posting to https://mywebsite.org/vtigercrm/modules/Webforms/capture.php and had no problem.

Now i had to change the posting address to https://mynewwebsite.org:888/vtigercrm/modules/Webforms/capture.php but it does not work

I can assure that it’s not a port issue as i’m using the same url in a html page to post the same form fields. All other methods i use to send data to that url work fine.

Is it an issue within the plugin managing the 888 port?

I really want to use the plugin because i can use shortcodes, i can send emails, i can create visually many forms, and i can use the recaptcha integration feature.

The purpose of this plugin for me is to send collected data from the form to my Vtiger CRM. Other Contact Form plugins haven’t been able to do that, just this one!

Could someone please help me?