I've been having the same problem with viewer 2 and the other viewers using viewer 2. I finally gave up and have gone back to the old viewer, specifically Phoenix which uses the old viewer.
I tried all of the suggested options and had no success, i was told others could see me fine but it took some of the fun out of things when i couldn't see myself.
Good luck, hope to see a workable answer here as when i went searching found nothing that worked.