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
  --> 563a73b64ab6b63cd82f9ca2cb8cd1c101a85491f89acdfe59f17671ab2c9cb0:12:12
   |
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
  --> 563a73b64ab6b63cd82f9ca2cb8cd1c101a85491f89acdfe59f17671ab2c9cb0:12:12
   |
12 |             signer.keys.add(
   |             ^^^^^^^^^^^^^^^