Deprecated: Use of MediaWiki\Skin\Skin::appendSpecialPagesLinkIfAbsent was deprecated in MediaWiki 1.44. [Called from MediaWiki\Skin\Skin::buildSidebar in /var/www/html/includes/skins/Skin.php at line 1639] in /var/www/html/includes/debug/MWDebug.php on line 386
The file seems to be an image of reduced size (thumbnail).
thumb
Please check the file $1.
If the checked file is the same image of original size it is not necessary to upload an extra thumbnail.