Fatal error: Uncaught InvalidArgumentException: Cannot load XML: StartTag: invalid element name in /var/www/phpBB3/vendor/s9e/text-formatter/src/Renderer.php:46 Stack trace: #0 /var/www/phpBB3/vendor/s9e/text-formatter/src/Renderers/PHP.php(303): s9e\TextFormatter\Renderer->loadXML() #1 /var/www/phpBB3/vendor/s9e/text-formatter/src/Renderer.php(66): s9e\TextFormatter\Renderers\PHP->renderRichText() #2 /var/www/phpBB3/phpbb/textformatter/s9e/renderer.php(250): s9e\TextFormatter\Renderer->render() #3 /var/www/phpBB3/includes/functions_content.php(618): phpbb\textformatter\s9e\renderer->render() #4 /var/www/phpBB3/viewtopic.php(1763): generate_text_for_display() #5 {main} thrown in /var/www/phpBB3/vendor/s9e/text-formatter/src/Renderer.php on line 46