Site broken after upgrade to last release

Hi support
my site is completely broken after my last plugin/theme upgrade .

Blank pages and errors i dont know where to begin with fixing .
my site is hosted on VPS with Debian 8.7.

site is www.dokws.com ( sorry to put site here)
Please help me to solve that (i can share admin access for support if needed )

Regards
Mel Kham
[email protected]