Sending form

The text of the message when I sending the form through the application is
Name of forme - Error: Unable to resolve host
kc-eu.kobotoolbox.org”: No address
associated with hostname

Welcome to the community, @Mohammed.saleh! Maybe a screenshot of your issue could be helpful for us to understand it pictorially.

@Mohammed.saleh, if the issue has still not been resolved, could you kindly share with us a screenshot of the Settings>Server, please? Maybe we could understand your issue with the screenshot you shared.