Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: unexpectedly found nil while forcing an Optional value
  --> 71272974fc8b03f3c38967ab503e3d6bd07c1e9d3d0acc97dcc6b2a33426b565:14:63
   |
14 |                 .borrow<&{NonFungibleToken.CollectionPublic}>()!
   |                                                                ^