Manual Flashing OS on a Lenovo Ideapad Duet 5?

Hello,

I have removed the read/write permissions on my Chromebook with a SuzyQable and now I’m wondering how to flash the OS, I’ve made the proper backups so it shouldn’t be an issue. I tried to follow the manual flashing guide but it was unsuccessful, I don’t have a clue what I’ve done wrong.

Thank you

If you’ve disabled WP, why not just run the script?