Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 6736775120f328a651d75e154a2e2a26c86000d5d2567b9423c58a55c5f253b6:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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