Submit button on dataset not working

Hi all,
I´ve been having this problem for two days now: when I set a submit button to send the form data the box goes blank and there´s nothing else I can do:

PS. My dataset is in write-only mode.

Hope that you can help. Because I don´t know if this is a technical issue or are my settings.
Ale.

For issues concerning the submit button through the Eix Editor, you are better suited contacting Wix Support with your issue as that button is not code related, for which this forum is for.
https://support.wix.com/en/about-wix/contacting-wix-support

Plus, they have their own pages for this too.
https://support.wix.com/en/article/creating-a-form-with-user-input-elements
https://support.wix.com/en/article/adding-a-submit-button-to-your-form