[Error Code: 1101] error caused by: 1 error occurred: * transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed: --> 3ee81dd92005f4cc675d254de99620f6531626e007a0256db8bcd335ce0a8e15:13:46 | 13 | self.transferToken <- collectionRef.withdraw(withdrawID: tokenID) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: unexpectedly found nil while forcing an Optional value --> 1e3c78c6d580273b.LNVCT:207:25 | 207 | let token <- self.ownedNFTs.remove(key: withdrawID)! | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Happy diving into the flow Remember to upgrade your contracts to 1.0!