Web Service Error

I'm trying to make a GET request but I get the error "An error occurred while sending the request." (screenshot attached).

How can I find out what this error is due to?

Thank you very much. Best regards
 

Dear Carlos Caballero Lorente! It looks like the Community cannot answer your question. That's why we have opened a Support Request with the Number SR-257632-L2L4N for you. A Software Support Specialist will contact you directly to follow up. We will update this thread with the solution as soon as we have resolved the Support Request. With best regards, DocuWare Support Team