Ensure that your data request is asking for proofs for the persona (and optionally for the accounts)
radixDappToolkit.walletApi.setRequestData(
// Persona proof is required - note the .withProof()
DataRequestBuilder.persona().withProof(),
// Accounts optional but should be proofed if business logic relies on token balances
DataRequestBuilder.accounts().atLeast(1).withProof()
)