Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 181596e62c1e93841ac2267e6a6a7e7af5e20c3daf2431d05411854d6a40fe94:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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