I’m experiencing this error on my homepage and ‘Specials’ pages only. I have replaced the specials page with a clean one from OpenCart install but it hasn’t fixed it.

Fatal error: ‘Unknown “tbSlotStart” function in “__string_template__b52438408ff4dab765f75fddc2c1e73dd7e2526e861e70d03af9714edf310714″ at line 9.’
in //system/library/template/Twig/ExpressionParser.php:574
Stack trace:
#0 system/library/template/Twig/ExpressionParser.php(351): Twig_ExpressionParser->getFunctionNodeClass(‘tbSlotStart’, 9)
#1 system/library/template/Twig/ExpressionParser.php(144): Twig_ExpressionParser->getFunctionNode(‘tbSlotStart’, 9)
#2 system/library/template/Twig/ExpressionParser.php(84): Twig_ExpressionParser->parsePrimaryExpression()
#3 system/library/template/Twig/ExpressionParser.php(41): Twig_ExpressionParser->getPrimary()
#4 system/library/template/Twig/Parser.php(144): Twig_ExpressionParser->parseExpression()
#5 system/library/template/Twig/Parser.php(100): Twig_Parser->subparse(NULL, false)
#6 system/library/template/Twig/Environment.php(619): Twig_Parser->parse(Object(Twig_TokenStream))
#7 system/library/template/Twig/Environment.php(671): Twig_Environment->parse(Object(Twig_TokenStream))
#8 system/library/template/Twig/Environment.php(396): Twig_Environment->compileSource(‘{{ header }}\n\n\n…’, ‘__string_templa…’)
#9 system/library/template/Twig/Environment.php(437): Twig_Environment->loadTemplate(‘__string_templa…’)
#10 vqmod/vqcache/vq2-catalog_controller_event_theme.php(23): Twig_Environment->createTemplate(‘{{ header }}\n\n\n…’)
#11 vqmod/vqcache/vq2-_home_sprintcl_public_html_storage_modification_system_engine_action.php(79): ControllerEventTheme->index(‘product/special’, Array, ‘{{ header }}\n\n\n…’)
#12 /home/sprintcl/public_html/storage/modification/system/engine/event.php(66): Action->execute(Object(Registry), Array)
#13 vqmod/vqcache/vq2-_home_sprintcl_public_html_storage_modification_system_engine_loader.php(122): Event->trigger(‘view/product/sp…’, Array)
#14 system/vendor/BurnEngine/library/ResourceLoader.php(47): Loader->view(‘product/special’, Array)
#15 system/vendor/BurnEngine/library/Extension.php(276): TB_ResourceLoader->fetchExtensionTemplate(Object(Theme_Catalog_Extension), ‘product/special’, Array, true)
#16 system/vendor/BurnEngine/widget/AbstractProductsListingWidget.php(274): TB_Extension->fetchTemplate(‘product/special’, Array, true)
#17 system/vendor/BurnEngine/catalog/plugin/LayoutBuilderPlugin.php(664): AbstractProductsListingWidget->render()
#18 system/vendor/BurnEngine/catalog/plugin/LayoutBuilderPlugin.php(613): Theme_Catalog_LayoutBuilderPlugin->renderRow(Array, ‘content’)
#19 system/vendor/BurnEngine/catalog/plugin/LayoutBuilderPlugin.php(411): Theme_Catalog_LayoutBuilderPlugin->buildArea(Object(TB_WidgetsArea), ‘common/home’)
#20 system/vendor/BurnEngine/library/DataBag.php(36): Theme_Catalog_LayoutBuilderPlugin->hasArea(‘content’)
#21 catalog/view/theme/BurnEngine/template/tb/layout.tpl(28): TB_DataBag->__call(‘hasArea’, Array)
#22 system/vendor/BurnEngine/library/OutputHandler.php(167): require(‘/home/sprintcl/…’)
#23 system/vendor/BurnEngine/library/OutputHandler.php(101): TB_OutputHandler->fetchLayout()
#24 system/vendor/BurnEngine/catalog/ThemeCatalogExtension.php(231): TB_OutputHandler->echoFooter(‘\n
#26 system/vendor/BurnEngine/library/OutputHandler.php(132): TB_OutputHandler->replaceOutput(‘…’)
#27 system/vendor/BurnEngine/catalog/ThemeCatalogExtension.php(236): TB_OutputHandler->ocResponseOutput(‘…’)
#28 system/vendor/BurnEngine/library/vendor/sfEventDispatcher.php(112): Theme_Catalog_Extension->ocResponseOutput(Object(sfEvent), ‘…’)
#29 /home/sprintcl/public_html/storage/modification/system/library/response.php(117): sfEventDispatcher->filter(Object(sfEvent), ‘…’)
#30 system/framework.php(171): Response->output()
#31 vqmod/vqcache/vq2-system_startup.php(104): require_once(‘/home/sprintcl/…’)
#32 index.php(23): start(‘catalog’)
#33 {main}