Hi @Florence Otieno,
The error suggests that you are building the app for Tablet channel but there are no form created under Tablet channel.
Have you created a form under Tablet channel and still facing this issue? OR You want to build for some different channel but Tablet is selected by mistake?
Try unselecting Tablet while building if you are not intended build for Tablet OR add a form under Tablet channel.
Thank you,
Anurag
