Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 579701c038e4d6a3a82c951ca626b7f2f5256b8e65bd99a4e605e0de365f9e18:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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