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 1/1 InvalidArgumentException in FrontHook.php line 154: Reference not found

    in FrontHook.php line 154
    at FrontHook->getParams(object(HookRenderBlockEvent)) in FrontHook.php line 67
    at FrontHook->showComment(object(HookRenderBlockEvent)) in FrontHook.php line 52
    at FrontHook->onShowBlockComment(object(HookRenderBlockEvent))
    at call_user_func(array(object(FrontHook), 'onShowBlockComment'), object(HookRenderBlockEvent)) in EventDispatcher.php line 164
    at EventDispatcher->doDispatch(array(array(object(FrontHook), 'onShowBlockComment')), 'hook.1.product.additional', object(HookRenderBlockEvent)) in EventDispatcher.php line 53
    at EventDispatcher->dispatch('hook.1.product.additional', object(HookRenderBlockEvent)) in ContainerAwareEventDispatcher.php line 167
    at ContainerAwareEventDispatcher->dispatch('hook.1.product.additional', object(HookRenderBlockEvent)) in Hook.php line 215
    at Hook->processHookBlock(array('name' => 'product.additional', 'product' => '1', 'fields' => 'id,class,title,content'), null, object(Smarty_Internal_Template), true) in smarty_internal_templatebase.php(157) : eval()'d code line 736
    at content_55a043e435d527_60727869(object(Smarty_Internal_Template)) in smarty_internal_templatebase.php line 188
    at Smarty_Internal_TemplateBase->fetch('file:product-produit.html') in SmartyParser.php line 365
    at SmartyParser->internalRenderer('file', 'product-produit.html', array(), true) in SmartyParser.php line 389
    at SmartyParser->render('product-produit.html') in ViewListener.php line 70
    at ViewListener->onKernelView(object(GetResponseForControllerResultEvent))
    at call_user_func(array(object(ViewListener), 'onKernelView'), object(GetResponseForControllerResultEvent)) in EventDispatcher.php line 164
    at EventDispatcher->doDispatch(array(array(object(ViewListener), 'beforeKernelView'), array(object(ViewListener), 'onKernelView')), 'kernel.view', object(GetResponseForControllerResultEvent)) in EventDispatcher.php line 53
    at EventDispatcher->dispatch('kernel.view', object(GetResponseForControllerResultEvent)) in ContainerAwareEventDispatcher.php line 167
    at ContainerAwareEventDispatcher->dispatch('kernel.view', object(GetResponseForControllerResultEvent)) in HttpKernel.php line 122
    at HttpKernel->handleRaw(object(Request), '1') in HttpKernel.php line 61
    at HttpKernel->handle(object(Request), '1', true) in TheliaHttpKernel.php line 77
    at TheliaHttpKernel->handle(object(Request), '1', true) in ParamInitMiddleware.php line 86
    at ParamInitMiddleware->handle(object(Request), '1', true) in SessionMiddleware.php line 80
    at SessionMiddleware->handle(object(Request), '1', true) in StackedHttpKernel.php line 23
    at StackedHttpKernel->handle(object(Request), '1', true) in Kernel.php line 188
    at Kernel->handle(object(Request)) in index_dev.php line 38