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
  --> 4d4a0b1294268a572f09e631d10c90d1c6148c0493f350f96b92f228d8bcfa85:12:12
   |
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
  --> 4d4a0b1294268a572f09e631d10c90d1c6148c0493f350f96b92f228d8bcfa85:12:12
   |
12 |             signer.keys.add(
   |             ^^^^^^^^^^^^^^^