Nothing wrong on my end though... do you have ヘリシェフ folder in raw_scenario/eidolon and 6067.json file in info_eidolon? They are the files for helishev, you should have them if you run 0_download_json. If you don't have then idk what wrong tbh.
But in case you do have them then it could be that you forgot to run 3_write_config (so it didn't show in player) or the files are corrupted? You can try delete those files and run again in that case.