The @symfony/stimulus-bundle loader generates an empty controllers.js, so Stimulus controllers from controllers.json (including ux-react) were never registered. Switching to vite-plugin-symfony/stimulus/helpers uses the virtual:symfony/controllers module that properly reads controllers.json. Also wrap react_component() output in a <div> since it only renders data-attributes, not a full HTML element. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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171 B