Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 6120f6c99110667f633091fa3f4cb382a2952bf5f5f9387d9ae875bd0d2802f2:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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