Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> fd1300a826b87f77947d456be2426c5429fbfba182d62adc063d14f2f7cc8c33:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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