Tweets and signing out


When I go on my twitter on PC or laptop, it doesn’t let me send any tweets, or log out of my accoun:
When I try to send a tweet, The words I type turn a light shade of grey and there’s no button to send the tweet.
When I try to sign out of my account, the settings button doesn’t do anything when I click on it, so I don’t even have the option to sign out.