How to fix my dualboot(bootloader) on my acer chromebook plus 514?

Hey, I’ve been trying to dual boot between chrome os and ubuntu on my device using crouton but when I partitionned my drive, it actually did and when I try to enter ubuntu pressing ctr+L, it shows me a bootloader error and I’ve searched how to fix it, even asked chat gpt right before making this post but I can’t manage to do it, can somebody help me please ? If it’s not possible can you tell me how to replace chromeos entirely with ubuntu please ?
Thanks a lot guys.

crouton isn’t used for dual booting.

Since you’re done a bunch of things that haven’t worked, I recommend performing a ChromeOS USB recovery to reset things and start over.

asking ChatGPT isn’t going to give you anything close to the correct answer.

You need to use the CRAP tool to repartition the internal storage, then boot Ubuntu from USB and install into the newly created/enlarged partition.

This is all covered in the chrultrabook docs.