What did I do wrong? why error?
$ dfx canister --ic call 4mmnk-kiaaa-aaaag-qbllq-cai getPool '(record { fee = 0; token0 = record{address="ryjl3-tyaaa-aaaaa-aaaba-cai"; standard="ICRC1"}; token1 = record{address="ghsi2-tqaaa-aaaan-aaaca-cai"; standard="ICRC1"} })'
(variant { err = variant { CommonError } })