I followed all the instructions regarding Universal Links implementation:
i. Add callback in appDelegate
ii. Enable ‘Associated Domains’ on your app ID
iii. Enable ‘Associated Domain’ on in your Xcode project
iv. Add the proper domain url link
v. Re-generate all provisioning profiles
vi. Add the ‘apple-app-site-association’ file to my website ---> (NOT YET)
But I keep getting this code signing problem:
And after Fix Issue :
All this happens only when I build into a Device, not in the Simulator. Any clues?

