Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 6487297c0d3abc206d09d7570b87c93beb2e09d98a98b1c541963594fdfbc441:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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