PSErrorCode:
| "missing_auth"
| "invalid_signature"
| "unregistered_builder"
| "not_owner"
| "expired_token"
| "grant_invalid"
| "grant_required"
| "grant_expired"
| "grant_revoked"
| "scope_mismatch"
| "fee_required"
| "ps_unavailable"
| "server_not_configured"
| "content_too_large"
Stable error codes returned by Personal Server.