Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: cannot find variable in this scope: `buyer`
 --> fd2575ce23f8c5c35a4c38d58f3b8e27de8028491c0cb2da1fca628e1ec3e72e:9:7
  |
9 |     if buyer.borrow<&Collector.Collection>(from: Collector.CollectionStoragePath) == nil {
  |        ^^^^^ not found in this scope

error: cannot find variable in this scope: `buyer`
  --> fd2575ce23f8c5c35a4c38d58f3b8e27de8028491c0cb2da1fca628e1ec3e72e:11:6
   |
11 |       buyer.save(<-collection, to: Collector.CollectionStoragePath)
   |       ^^^^^ not found in this scope

error: cannot find variable in this scope: `buyer`
  --> fd2575ce23f8c5c35a4c38d58f3b8e27de8028491c0cb2da1fca628e1ec3e72e:12:6
   |
12 |       buyer.link<&Collector.Collection{NonFungibleToken.CollectionPublic, Collector.NFTCollectionPublic, MetadataViews.ResolverCollection}>(Collector.CollectionPublicPath, target: Collector.CollectionStoragePath)
   |       ^^^^^ not found in this scope