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
  --> e307137db1b4786ad7f8d561ce44f8b1f19b311e315e63bbdb51913dc301ec72:9:22
   |
 9 |     let publicVault = sender
10 |       .getCapability(/public/flowTokenColdStorage)!
11 |       .borrow<&ColdStorage.Vault{ColdStorage.PublicVault}>()!
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^