Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cffe79525c61e6c6b1ecf2260a7203f4b7dca8dbe882f8ba86418edffe48643f:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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