Message to original poster, or anyone else experiencing this issue.
I was going INSANE because I love and use the snip app a lot. I tried all of the fixes I saw in this thread, and nothing was working. Lo'-and-behold I had NOTIFICATIONS TURNED OFF! How could I not have thought to check there first? I never turned them off, so why would I look there? Maybe on one of the recent updates they got turned off? Anyway, sometimes the obvious answer is the answer....or at least it was for me!