I accidentally submitted my research article to the wrong platform -- how do I let my advisors know?
If your advisors know of the problem, they can help fix it. For example, perhaps they might suggest submitting the article to a different conference. Even if the problem is not fixable, they can still help mitigate it, e.g. by mentioning in any reference letters that you have written a marvelous piece of work that wasn't published because of some confusion with the conference submission platform.
You gain nothing by hiding the information, so do not hide it.
One more thing: it is quite possible that you might not have a problem in the first place. After all, if the organizers really had two submission links, one of which they did not check but still sent out submission numbers &amp; receipt notifications, then it's not surprising that some papers are going to be misfiled. They could very well be kicking themselves over the error and would do their best to make up for it. Don't panic before you get a response from them.