Error when submiting form

One of the data collectors on my team is having an issue when collecting data, it does not let her submit the form and the following message appears:

Welcome to the community, @anaritacoelho! Is this an issue with only a single device or is it an issue with multiple devices? Could you also share with us a screenshot of your app’s Settings>Server so that we could understand if you have configured your app correctly?

Thank you.

It’s an issue with only a single device and here it follows the screenshot of the server.