Cannot create an account using Appwrite auth (Account class)

I've already posted that in an old thread and I've read to always create a new one instead, so here it is: Even though few weeks ago creating a new user using email & password worked, now on all of the environments I'm getting

Either error 404 or 400 when using _account.create:

err = {AppwriteException} AppwriteException: , 404 page not found\n (0) message = "404 page not found\n" type = null code = null response = null

OR

err = {AppwriteException} AppwriteException: general_bad_request, There was an error processing your request. Please check the inputs and try again. (400) message = "There was an error processing your request. Please check the inputs and try again." type = "general_bad_request" code = 400 response = {_Map} size = 4 0 = {map entry} "message" -> "There was an error processing your request. Please check the inputs and try again." 1 = {map entry} "code" -> 400 2 = {map entry} "type" -> "general_bad_request" 3 = {map entry} "version" -> "0.13.23"

Using newest appwrite: ^12.0.3 SDK for Flutter

Help would be greatly appreciated as I cannot ship the app without it 🙂