Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction preprocess failed: [Error Code: 1101] cadence runtime error: Execution failed:
error: cannot map `BorrowValue | Storage` through `AccountMapping` because the output is unrepresentable
  --> d7db3c2846e54457f13a0cf0ae8144ee55184d7e1702ab9bfc50fb25e7c0a16a:12:12
   |
12 |             signer.keys.add(
   |             ^^^^^^^^^^^ this usually occurs because the input set is disjunctive and `AccountMapping` is one-to-many

error: cannot access `add`: function requires `Keys | AddKey` authorization, but reference is unauthorized
  --> d7db3c2846e54457f13a0cf0ae8144ee55184d7e1702ab9bfc50fb25e7c0a16a:12:12
   |
12 |             signer.keys.add(
   |             ^^^^^^^^^^^^^^^