Problems with Youtube shortcode

I have installed the plugin on 3 WordPress websites but it didn′t run on any website I did try the youtube-shortcode.
There′s is only showing a white place.
This code is showing in source-code :
<div class="youtube_player display_bottom ytu_6322fe32bb39e yt_player_dark" thumb="https://www.wmwebservice.de/divitest/wp-content/dsgvo-all-in-one-wp-pro/thumbnails/LXb3EKWsInQ/LXb3EKWsInQ.png" videoid="LXb3EKWsInQ" width="100%" height="350px" theme="light" controls="1" rel="0" autoplay="0"></div>

The page I need help with: [log in to see the link]