Get another device open https://dashapp.patrickdesign.nl/, click the remote button on the right and enter the code you see here above to control your dash.
After entering the code make sure you bookmark that page to be able to change things in the future.
Or enter an existing code to get that dash back:
On Android it works best with Microsoft Edge browser.
If you are on ios, please use Safari and add this page to your homescreen in order to get the ability to go fullscreen