Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 0371ff215f0277fa817dec78c5d82992c34a5ce9c3abf8c3ec86f0e67ce738fa:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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