Sorry I disappeared for a few days, life and all. I'm assuming papergarden worked on the untouched, not rooted, version when you bought the tablet before you loaded anything at all right?
Invalid token 1001 sounds almost like an account error, especially since I set mine up and it doesn't do that and we have pretty close to identical setups. Even more so because using the original stock version doesn't have any apps removed so there shouldn't be anything it could query that would come up missing system wide.
Have you tried disconnecting your samsung account, removing it from the phone, then readding the samsung account?
Another thing to try, just make a dummy account and try to grab one of the free magazines - see if the token error still occurs. Normally I think of token errors as accounts not matching the id that they were created with.