Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ecdff2a978e90d47f1b80d574f27259a10ec658b17765af0bbc3b905a1ba2178:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unexpectedly found nil while forcing an Optional value
   --> 1e3c78c6d580273b.LNVCT:218:63