Accordions visualization is not working

After your last update, I was able to recover my accordions information. However "accordion" visualization doesn't work, only the "tab" viz. I've tried with both shortcodes. First one doesn't show anything. Second one (the one to avoid conflicts) show the shortcode on the website.

Also I cannot see icons on the tab mode (I don't know if this happens also in accordion mode). I enter the icon html code, but only shows a box, instead an icon.

Can you help me?