I have a custom master page using a few JS utilities like jQuery and skel.js that has been experiencing some errors whenever the page loads. The errors are transparent to the user, but show up in dev tools. The first one is from the "ScriptResource.axd" file and says "Sys.InvalidOperationException: The PageRequestManager cannot be initialized more than once." The second error is from "jQuery-1.7.2.min.js" and reads "Could not complete the operation due to error 80020101."
I've googled around but can't find answers that make much sense to me (I'm not a JS or Ajax expert by any stretch of the imagination) because they're all for other proprietary programs/sites, so if someone could either explain it to me in SharePoint terms or point me to a resource that can help I would greatly appreciate it!