Experiment Midori - "unknown variant `byte2nibbles`

EXecuted command

./experiments/run_experiment.rb -c experiments/midori_experiment.json -d /tmp

Obtained error

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { path: Path { segments: [Map { key: "operators" }, Seq { index: 0 }] }, original: Error("unknown variant `byte2nibbles`, expected one of `xor`, `eq`, `s`, `mc`, `lfsr`, `ByteToNibble`, `bits2nibble`, `nibble2bits`, `and`", line: 1, column: 51048) }', src/json_loader.rs:141:12
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace