SendFox Error

Hey team,

Your integration used to work amazingly but the past few days I’m having troubles. It just shows error but no reason for the error:

https://i.postimg.cc/B6fG8Vkw/Screenshot-2021-10-13-at-16-11-00.png

Any thoughts?

Thanks in advance!

Cheers,
Aron

The page I need help with: [log in to see the link]