Have a look at this question. It got down-voted for reasons known only to Gandalf. At least I would like to know why I got down-voted and what can I do to improve it?
Downvotes are by design anonymous and do not require comments. Some people will leave a comment anyway, out of the kindness of their hearts, but it's not required or expected. However, when you hover over the downvote link, it will tell you the standard reason for downvotes: "This question does not show any research effort; it is unclear or not useful".
In the case of your question, you have made the effort to post a lot of information. But you've missed the most salient point, which is the error message you included and which tells you exactly what the problem is. Your question does not show any attempts to troubleshoot based on that message, not even the basic "does the file actually exist or not". I would guess that this is the reason for the downvote.