Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 7b4b35958dbff1c492e698fd17f65584c2ccaab7d3c42d0c323f9ca8ccea535f:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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