Critical error preventing the plugin to work properly

[xavierlefevre]

1. When I land on my board with Scrummer, the points are well displayed
2. If I navigate in Trello and come back in my board, the plugin does not display anymore and I get this in the console :

I also use Stylish, Quick-Notifier for Trello and Trellists

[foucdeg]

@xavierlefevre

var boardHeader = document.querySelector('.js-board-header');

boardHeader is null so we cannot call boardHeader.querySelector() later.
This means that for some reason, you don't have a div with class .js-board-header. Still investigating.

[foucdeg]

I surrounded the code in an if block. That should prevent the console error, however it might prevent the board total from showing.