The editor tries to load a Flexbox Container element, but rendering stops and an error appears. The failure originates from a missing or broken container component. PHP or JavaScript aborts while building the container markup. The abort leaves a blank area in the editor and on the live page.
Typical triggers include disabled Flexbox Container feature, outdated Elementor version, PHP memory exhaustion, corrupted container assets, or a plugin that interferes with the container render hook. Server security modules may block the AJAX request that supplies container data, resulting in a malformed response.
When the error occurs, console logs show Uncaught Error: Elementor: Failed to render Flex Container. PHP error logs reveal fatal errors or memory limits reached during container processing. The system info panel often marks the Flexbox Container status as disabled.