Hi @Karteek Yeluru ,
Can you please verify that you have permission to create the application? Make sure that you are logging in with a role that has "Create" permissions such as an Application Administrator or Global Administrator role when you try this. https://learn.microsoft.com/en-us/azure/active-directory/users-groups-roles/directory-assign-admin-roles
From the Prerequisites:
To add an application to your Azure AD tenant, you need:
- An Azure account with an active subscription. Create an account for free.
- One of the following roles: Global Administrator, Cloud Application Administrator, Application Administrator, or owner of the service principal.
- (Optional: Completion of View your apps).