Transaction

Execution failed:
error: value of type `PublicAccount` has no member `toString`
  --> b45f2ca9db6e54b77041b65eafaa6fcce6a64e8caac56cbde55c4347df8f8dba:29:116
   |
29 |                 ?? panic("Could not borrow receiver reference to the recipient's Vault. Address: ".concat(recipient.toString()))
   |                                                                                                                     ^^^^^^^^ unknown member