TypeError: Cannot read property 'click' of null

I have been mass following / unfollowing / favoriting / unfavoriting on twitter with these codes ; ``` $('button.follow-button').click(); $('button.ProfileTweet-actionButtonUndo').click(); $('a.favorite').click(); ``` I found some not-working codes online and tried to fix, so they are nearly working now. The only thing is to go to the page on google chrome, press f12 , open console and run the command. So now, I wanted to use the same system in Vine. There"s an extension for google chrome to use vine ( https://client.vineclient.com/ ) and I am trying to use it because original webpage ( vine.co ) is not even useful. The only difference between twitter and this, is that, in vine client for ^followers^ section, an pop-up comes in the page. And I don!t know if it detects the buttons. So , the code of the button I am trying to click from original page , ( I took it using developer tools / elements ) ``` <div class="user"> <img alt="Tuğçe Nur TEKİN" class="avatar" src="http://v.cdn.vine.co/r/avatars/3C2E4F40F11066473630650847232_pic-r-1397241239141e51579937f.jpg.jpg?versionId=ttIz4CExCjW_4TEnxYbnehPPpXRyzMco"> <div class="wrapper"> <a class="username" href="https://client.vineclient.com/explore/users/1066473613911363584"> Tuğçe Nur TEKİN </a> </div> <a class="button follow" data-id="1066473613911363584"> <i class="icon"> </i> </a> </div> ``` The thing to click is here : When I manually click, it changes into this : ``` <a class="button unfollow" data-id="1066473613911363584"><i class="icon"></i></a> ``` And the command I use to try to click ``` $(".a.follow").click(); ``` The error I get, ``` TypeError: Cannot read property 'click' of null ``` How can I fix that? By the way, in these codes, I couldn"t find actually any ^button^ codes.. Thanks! UPDATE - http ://prntscr. com/3pmo2i - http ://prntscr. com/3pmoyk - http ://prntscr. com/3pmpym