Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cd52d525b8d98a26113e177772d21b42d8498546a7b797abd19c128a82cf34b0:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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