I had the same thing happen a few days ago, and the student left feedback that was not true. I provide code based courses and all the code obviously works since otherwise the videos could not show the working code. Coding is tricky and if you have just one thing out of place it might not work and can throw errors. The student left this feedback,'does not work locally and no instructions how to use' which is totally misleading and untrue since there are instructions for every step and you can copy the source code and it works without issue. Often times the students don't copy the code correctly or make a change and don't see it working. I have almost 27000 reviews and unfortunately this happens way too often and if I get a chance to discuss it with the student the issue if always on their end. Its totally not fair as even if you get a hold of the student they cannot change it anyway so no point. Doesn't matter how incorrect the rating and the feedback is. I had another one where the student was saying the section 4 did not work and he had no audio. The funny thing is there was only 3 sections in the course. So this really isn't valid feedback but nothing can be done. Most of the low ratings you will find also have a student that is no longer in the course.
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