The system flew off very hard, the files could not be recovered, so the site had to be copied from the host. But now at the entrance to the backend, a white screen, with access.log displaying
127.0.0.1 - - [12/Dec/2016:09:48:30 +0300] "GET /backend/web/ HTTP/1.1" 200 277 "http://cremea.lc/backend/" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:50.0) Gecko/20100101 Firefox/50.0" 127.0.0.1 - - [12/Dec/2016:09:57:34 +0300] "GET /admin HTTP/1.1" 200 278 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:50.0) Gecko/20100101 Firefox/50.0" 127.0.0.1 - - [12/Dec/2016:09:56:09 +0300] "GET /backend/web/index.php HTTP/1.1" 200 278 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:50.0) Gecko/20100101 Firefox/50.0" error display enabled
display_errors=on display_startup_errors = on error_reporting = E_ALL
access.logthere is alsoerror.log- Aleksey Shimansky