Board Thread:Question and Answer/@comment-114.79.12.206-20150326190553/@comment-887715-20150327171130

Have you tried logging into Twitter via Settings(a.k.a manual login)? It happens sometimes(and sometimes take pretty long time!), and hard to avoid(even a avid player like me had it too). Just give it some time and you'll be able to use it as usual.

To this day, what have caused this problem remains a mystery even to me. But perhaps devs or the Twitter have the answer...?