There are a number of ways to report an issue to support.
The easiest way is to go to https://help.tinymedicalapps.com/digital-health-passport and post a message using the helpbot on the bottom right hand side of the screen.
You can also email email@example.com
If you are in the app trying to login there is a Report Issue link which will open the email application on your phone.
Inside the Digital Health Passport app there is a support link in the side menu.