I cannot tweet, the tweet button is 'greyed out'?


For the past week I have been unable to tweet. This is because the ‘Tweet’ button remains grey, so I cannot send I tweet. I realized if I click the photo button then return to the tweet it will turn blue… So I can then send the tweet. However, It is extremely annoying to do this each time. Also to begin with, tags and hashtags don’t appear, its only until after I clicked the photo button. Please help, its so annoying!