Code html/css apears on page

I don’t know how or why but suddenly a strange code appears in the middle of the page.
As soon as I started to enter the details of the teams, coaches and players, that code appeared in the middle of the page:

“#sp-player-gallery-7902 { margin: auto; } #sp-player-gallery-7902 .gallery-item { float: left; margin-top: 10px; text-align: center; width: 33%; } #sp-player-gallery-7902 img { border: 2px solid #cfcfcf; } #sp-player-gallery-7902 .gallery-caption { margin-left: 0; } /* see gallery_shortcode() in wp-includes/media.php */”

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


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