Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f0db2999fecee685226b68f8037432ec19130774c086bc1ddfb394c18f271a50:12:46
   |
12 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unexpectedly found nil while forcing an Optional value
  --> 8f3e345219de6fed.NFL:69:63