critical error in rolling back of updated plugins and wordpress

For a while, i didn’t updated plug-in and also wordpress.

So To upgrade, first I made back-ups using updraft plug-in. And I updated plug-ins and then wordpress too.

After that, web page is opened with no problem but I found that when i try to edit it, then editing page won’t open. So I went to updraft and click retore – among options i didn’t click all, just “plug in” (because I though what i did was only updating plug-ins other than updating wordpress).

But in the middle, suddenly it showed ‘critical error’ and I can’t access our website. What should I do?

The page I need help with: [log in to see the link]