Hi SrinathMannam-4826,
Welcome to our Microsoft Q&A platform!
You can try the following steps to troubleshoot this issue.
1.Select the configuration "Debug" and platform "iPhone"
2.Check if this iPhone has been added to your provisioning profiles
3.Delete the "bin" and "obj" folder under the project folder, clean the solution and rebuild it
4.Keep IOS Bundle Signing -> Custom Entitlements blank.
Regards,
Kyle
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