5.3.2, unser Freund, der unknown tag "s"

Ich hänge mich mit den Problem mal an. Hier das gleiche aktuell nochmal Plugins aktualisiert und alle auf 5.3.2 geprüft.
Aktuell einmal warten ob und wann der Fehler wieder kommt und dann mim acces log abgleichen

2017/09/13 09:53:35 [error] 17845#17845: *36058 open() "/var/www/xxx/web/xxx/themes/Backend/ExtJs/backend/_resources/images/icons/ico_growl.png" failed (2: No such file or directory), client: 88.99.135.226, server: xxx.de, request: "GET /themes/Backend/ExtJs/backend/_resources/images/icons/ico_growl.png HTTP/1.1", host: "xxx.de", referrer: "https://xxx/backend/"
2017/09/13 09:55:48 [error] 17847#17847: *36220 FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught SmartyCompilerException: Syntax Error in template "/var/www/clients/client1/web2/web/xxx/themes/Frontend/Bare/frontend/index/index.tpl" on line 7 "<html class="no-js" lang="{s name='IndexXmlLang'}{/s}" itemscope="itemscope" itemtype="http://schema.org/WebPage">" unknown tag "s" in /var/www/clients/client1/web2/web/xx/engine/Library/Smarty/sysplugins/smarty_internal_templatecompilerbase.php:657
Stack trace:
#0 /var/www/clients/client1/web2/web/xxx/engine/Library/Smarty/sysplugins/smarty_internal_templatecompilerbase.php(443): Smarty_Internal_TemplateCompilerBase->trigger_template_error('unknown tag "s"', 7)
#1 /var/www/clients/client1/web2/web/xxx/engine/Library/Smarty/sysplugins/smarty_internal_templateparser.php(2388): Smarty_Internal_TemplateCompilerBase->compileTag('s', Array)
#2 /var/www/clients/client1/web2/web/xxx/engine/Library/Smart" while reading response header from upstream, client: 84.175.203.160, server: xxx, request: "GET /checkout HTTP/1.1", upstream: "fastcgi://unix:/var/lib/php5-fpm/web2.sock:", host: "xxx", referrer: "https://www.paypal.com/webapps/hermes?flow=1-P&ulReturn=true&token=EC-8X328513JD1561818&country.x=DE&locale.x=de_DE"