Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> eef66209105c55dba92ea7d722b08216f00c6ce85b816c64580bdb14a3e79bbc:13:46
   |
13 |                         self.transferToken <- collectionRef.withdraw(withdrawID: tokenID)
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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