Help; Coursera Machine Learning Course stuck at 98%

[appleblueberry]

Unsupervised Learning, Recommenders, Reinforcement Learning. Final reinforcement lab question. coursera requires 80% completion. I have overall 95=% completion. just the final lab question has only 2 questions. it's not going above 50 no matter how close to the answer i get. is anyone else having the same issue with the exercise 2 of the final lab question. is there an official answer for that question. anyone? it's the one by deep ai and Stanford online

[Ahmed-3411]

If you're consistently getting 50/100 even though all visible tests pass, the issue is most likely not with the visible outputs but with one or more hidden test cases used by the grader. These hidden tests often check edge cases, numerical stability, terminal-state handling, or whether your implementation strictly follows the expected API and function signatures.

Before assuming it's a grader bug, try :

Restart the notebook kernel and run all cells from top to bottom.
Make sure you're using the latest version of the assignment notebook.
Verify that you haven't modified any provided function signatures, global variables, or grading cells.
Ensure all visible tests pass in a fresh runtime before submitting.

If the score remains exactly 50/100 after multiple clean submissions, there may be an issue with the grader or the assignment itself. In that case, I recommend posting on the official DeepLearning.AI/Coursera forum or contacting the course staff with your submission details, as they can verify whether it's a grading issue.

Hope this helps.