Ok I checked your site and the first thing I noticed is this notification:
http://prntscr.com/bhhm3q, which suggests that while the update was in process you clicked on some button tried to access another page, that's why you got some white page.
I checked your site and everything is working fine and I also updated your plugins and it caused no issue on your website.
We are also releasing the theme update which will be available in an hour or two. We have tested it well and it won't cause any issues.
Just make sure when you update then let the update finish and then re-save the permalinks and then check your site.