Hi Michal,
The logo carousel seem to be coming from a third party plugin. Try double checking if the plugin itself is actually activated on the site.
If it is already active but is still only showing the shortcode, kindly get in touch with the plugin developer as we cannot provide support for third party plugins or scripts due to the fact that there is simply no way to account for all of the potential variables at play when using another developer’s plugin or script. Because of this, any questions you have regarding setup, integration, or troubleshooting any piece of functionality that is not native to X will need to be directed to the original developer.
Thank you for your understanding.