Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4d4a2643a0ae5f9e39778e22817989656ee675f63e2d8219f1bc234232c83b9b:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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