hi @chrysa
Kindly go through the below post comment link to do the correction
An usual issue with learners having this kind of error is because their code might be right but the code implemented is not as per how the autograder wants it to be.
Use of incorrect function, or use of global variables or implementing steps not how it was given, like if the steps were divided into 3 steps but you might have written this into single step or vice versa. the key point to pass these assignments is to only replace NONE placed between the markers ###START AND END CODE HERE### with whatever part of codes already given.
kindly go through the linked comment, if you are still unable to clear, then click on my name and message screenshot of the codes which threw assertion error.
Regards
DP