Installing a new theme in the Prestashop store 1.4.3

I installed a theme using the export / import theme module, as shown in this video : and now I'm getting this message in the header:

  

Fatal error: Uncaught exception 'SmartyCompilerException' with message 'Syntax Error in template' /var/www/html/myproject/themes/food-store/header.tpl "on line 87" & lt ; nav> {hook h="displayNav"} " unknown tag "hook" 'in /var/www/html/myproject/tools/smarty/sysplugins/smarty_internal_templatecompilerbase.php on line 431

Does anyone have any idea what this error might be?

This is the line that is giving error (87):

<div class="header-container">
                <header id="header">
                    <div class="banner">
                        <div class="container">
                            <div class="row">
                                {hook h="displayBanner"}
                            </div>
                        </div>
                    </div>
                    <div class="nav">
                        <div class="container">
                            <div class="row">
                                <nav>{hook h="displayNav"}</nav>
                            </div>
                        </div>
                    </div>
                    <div>
                        <div class="container">
                            <div class="row">
                                <div id="header_logo">
                                    <a href="{$base_dir}" title="{$shop_name|escape:'html':'UTF-8'}">
                                        <img class="logo img-responsive" src="{$logo_url}" alt="{$shop_name|escape:'html':'UTF-8'}"{if $logo_image_width} width="{$logo_image_width}"{/if}{if $logo_image_height} height="{$logo_image_height}"{/if}/>
                                    </a>
                                </div>
                                {if isset($HOOK_TOP)}{$HOOK_TOP}{/if}
                            </div>
                        </div>
                    </div>
                </header>

In this part ...

  {hook h="displayBanner"}

It seems like the version you're compiling is smarty's 3:

@link http://www.smarty.net/
 * @copyright 2008 New Digital Group, Inc.
 * @author Monte Ohrt <monte at ohrt dot com> 
 * @author Uwe Tews 
 * @package Smarty
 * @version 3.0.7