Pinned lesson on my Hebrew lesson feed, named "aula 23", is empty and simply tries to import

On my Hebrew lesson feed, there is a pinned lesson names “aula 23”. When I clicked on it, it opened an empty pop-up window, and when I closed it, I got a message window from lingq saying “Oops”, couldn’t import lesson etc. I then noticed that unlike the other lessons on the feed, it has an “Import” button where the rest have “Open”.

Is this a real lesson? Do others have it on their lesson feed too? Also, from a security standpoint, is it possible for a lesson to try to install malware etc?