Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 7eda4c2e85c563467d9362a0456f831bb31e85d50acff05a98e6f03de3fbc421:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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