Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 542ab10c56639cc3544e4afca68200bdfde2f264622d804e46a520cd396d0e5e:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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