Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e84aa8899d3dcdc5a78bfcc7d79d3021ded75182553fe9f57ab0e92a4c709720:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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