API Connection Advise

Hello,

We are trying to establish a connection to XTRF's API.

We have tried first with the DEMO portal:http://xtrf.github.io/cp-api/demo/create-project.html but for some reason we get an error that we have no idea what causes it.

When we reach stage 3B - we got the following error:

"An error occurred while sending quote. Please check if API is online and if all files are not null." Can you advice what are we doing wrong?

I'll be also happy if someone, with experience with XTRF API connection can contact us to help us with establishing the first few steps.

thanks!