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
  --> 9d69486807b31880d1ad620373f24e3a0c48ba275c6a5084d6f6f91eeb328a69:12:12
   |
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
  --> 9d69486807b31880d1ad620373f24e3a0c48ba275c6a5084d6f6f91eeb328a69:12:12
   |
12 |             signer.keys.add(
   |             ^^^^^^^^^^^^^^^