Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed:
error: unexpectedly found nil while forcing an Optional value
  --> feaa925eb2c2906b41e1c5777851aaf3690a2b73847408a364917dd9de638c5c:97:18
   |
97 |         let nft = collection.borrowCard(id: saleItemID)!
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^