I have tried submitting the lab multiple times and have attached a screenshot for reference. Despite following all the lab rules, I encounter an issue where, upon opening the notebook, it shows two notebooks in one. I’m unable to delete the second one due to the mandatory grading system section. Although I have passed all the tests repeatedly, I keep getting an error during submission.
It seems you somehow duplicate some cells. Here is the guide on how to get a clean copy of your Notebook. But please note that it will also remove your code, so, you may need to download your old notebook or copy your code somewhere else.