Prestashop erreur 500

Bonjour,

nous souhaitons régler un problème d'erreur 500 sur un de nos sites.
Nous sommes sous Prestashop 1.7.2.2 et en multi boutiques. Le code d'erreur est le suivant:
ContextErrorException in MessageFactory.php line 197:
Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"?
in MessageFactory.php line 197
at ErrorHandler->handleError('2', '"continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"?', '/homepages/28/d[Téléphone visible pour les membres Pro]/htdocs/clickandbuilds/PrestaShop/Plaisiranal/vendor/guzzlehttp/guzzle/src/Message/MessageFactory.php', '197', array('class' => 'GuzzleHttp\Message\MessageFactory', 'file' => '/homepages/28/d[Téléphone visible pour les membres Pro]/htdocs/clickandbuilds/PrestaShop/Plaisiranal/vendor/composer/../guzzlehttp/guzzle/src/Message/MessageFactory.php')) in DebugClassLoader.php line 169
at require_once() in DebugClassLoader.php line 169
at DebugClassLoader->loadClass('GuzzleHttp\Message\MessageFactory')
at spl_autoload_call('GuzzleHttp\Message\MessageFactory') in Client.php line 78
at Client->__construct(array('base_url' => '[URL visible pour les membres Pro]', 'defaults' => array('timeout' => '5.0'), 'headers' => array('Accept' => 'application/json'))) in ModuleManagerBuilder.php line 159
at ModuleManagerBuilder->__construct() in ModuleManagerBuilder.php line 74
at ModuleManagerBuilder::getInstance() in ProductController.php line 180
at ProductControllerCore->init() in Controller.php line 186
at ControllerCore->run() in Dispatcher.php line 379
at DispatcherCore->dispatch() in index.php line 28
Objectif : fixer le problème d'erreur 500