It could be a certain module or plugin causing the error. I'd propose re-installing the Prestashop core files if you haven’t already. I am loving the flexibleness with the PrestaShop API. It's so functional and makes it very easy to integrate with other platforms. And lastly, multi-channel promoting platforms permit https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html