Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 163e6072b1f8ce5e84e6b7cea99220b15f3e1102e0145942de814fe32b71c057:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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