Elementor relies on several tables that store page data, settings and CSS. When one of those tables is absent or corrupted WordPress is unable to load the editor and shows a database table missing message.
The error appears because the query that Elementor runs fails to find the required table. The missing table is a core WordPress table such as wp_options or an Elementor specific table like wp_elementor_data. The problem usually stems from an incomplete migration, a failed backup restore, wrong table prefix or MySQL engine issues.