Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f9ef2ffaa410525ee137cdc76128879d60f6a21c560c11a84324ec2c9bc946f3:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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