Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 778a90e05d4df9126469c23ba898db6ff91f0168650a2d0c2b747c3ec230990a:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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