Because the Livechat plugin is adding_action incorrectly: add_action( 'elementor/init', 'LiveChat\text_register_categories' ) - (screenshot_1).
The action 'elementor/init' is the initialization action that will refresh everything. The correct way is to use another action, the action 'elementor/elements/categories_registered' will only do the function of registering categories for Elementor.
Since this is not a plugin managed by us, the only temporary solution is to fix the code in the plugin (screenshot_1). The plugin author may update this error in the future, otherwise after each plugin update you will need to find this code in this file to check and fix the action correctly, if you do not update this plugin then you do not need to do anything.
Regards!