Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0a0b78800d3fc343b6b5fe3fb66a14b9c388f168fd489c673f9548dacf0ea7c5:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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