I've been using the Canvas Parent app for my son for a few years now.  It was working fine until recently (including this school year). When trying to load grades for ANY class, an unexpected error is returned. There is a retry option, but that doesn't help.  I've cleared my browser cache and uninstalled/reinstalled the app.  Other functions within the parent app are working (for example, it will load the front page for each course). Out of ideas, need help!