I am not able to preview my app in sandbox developer account
Attachments: Up to 2 attachments (including images) can be used with a maximum of 512.0 KiB each and 1.0 MiB total.
Make sure there is a subscription rate set for the locale of your sandbox merchant account.
No one has followed this question yet.
Clover sandbox merchant from application automatically gets removed.
Sandbox - Can't add Metered events
how to create a test merchant
Sandbox Merchant Account Password
Cannot see device on dev kits after I reassign my device to a new merchant recently created (sandbox)