Hmpf, it seems that on MacOs it is possible to use OAuth as oposed to BotPasswords on Windows? In any case, the working is similar. I am not a huggle dev but an user. First that comes to my mind is that you did not authorize huggle to use rollback on enwiki. If you're using OAuth/BotPasswords be sure to select too a group of permissions that allows the application to use rollback. If you already have done that, be also sure that you've Special:Mypage/huggle.css and Special:Mypage/huggle3.css configured correctly (enable:true). If nothing helps, hopefully a more experienced user will reply or you can create a ticket in the Huggle project of the phabricator.wikimedia.org issue tracker. I hope that your issue gets resolved soon.