I downloaded the sample application and on building the same gives error 'ATKSingleLineWidget/SLTWSingleLineWidget.h". Am i missing something.
are you using the swift environment? If so, can you please refert to the following topic: https://developer-support.myscript.com/support/discussions/topics/16000007817
If no, is it possible to learn more regarding your use case? Did you just run the sample "out of the box" after adding your certificate? On which device are you running it?