M templates/seo_tags.html →
templates/seo_tags.html-<meta name="title" content="{% if page.title %}{{ page.title }}{% else %}{{ config.title }}{% endif %}">
-<meta name="description" content="{{ config.description }}">
+<meta name="title" content="{{ page?.title or config.title }}">
+<meta name="description" content="{{ page?.description or config.description }}">