Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 5e1d1439e4a490e775bb3da8705ea6b800b4c935f2af49c4a0a86905c8e3bc19:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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