Однако блок я пока так и не починил - при вставке кода вывода картинки начинаются проблемы.
В логах nginx выводит нечто такое:
2016/11/07 22:58:15 [error] 819#0: *232328 FastCGI sent in stderr: "PHP message: PHP Fatal error: Call to a member function getAttribute() on null in /home/aus/www/asc.kz/forum/system/Theme/Theme.php(744) : eval()'d code on line 1077" while reading response header from upstream, client: 95.56.242.34, server: asc.kz, request: "GET /forum/ HTTP/1.1", upstream: "fastcgi://unix:/tmp/php5-fpm.sock:", host: "asc.kz", referrer: "https://asc.kz/forum/admin/?adsess=ai6c6e629doh4rduuqvng5fi57&"
2016/11/07 22:59:11 [error] 819#0: *232415 FastCGI sent in stderr: "PHP message: PHP Fatal error: Call to a member function getAttribute() on null in /home/aus/www/asc.kz/forum/system/Theme/Theme.php(744) : eval()'d code on line 1077" while reading response header from upstream, client: 95.56.242.34, server: asc.kz, request: "GET /forum/index.php?app=core&module=system&controller=widgets&do=getBlock&blockID=app_blog_entryFeed_zxxkm9a5d&pageApp=forums&pageModule=forums&pageController=index&pageArea=sidebar&orientation=vertical&csrfKey=dde455ab9749ad6f00f697a89bbb530a HTTP/1.1", upstream: "fastcgi://unix:/tmp/php5-fpm.sock:", host: "asc.kz", referrer: "https://asc.kz/forum/"