IOS Apple Login "Apple-AuthZ-Code is not enabled for this client"

We are trying to use Apple Login for our Mobile IOS Swift App. When used we receive this error from Auth0. Any suggestions? Thanks

Exchange Failed: Grant type urn:ietf:params:oauth:grant-type:token-exchange with subject_token_type http://auth0.com/oauth/token-type/apple-authz-code is not enabled for this client