Thread:Skin talk:Chameleon/No styling after straight composer install/reply

I'm not sure that  is needed but what we do know is that the inferior Less parser from MW (reasons for why it is inferior [0]) is colliding [1] with the required Less parser (oyejorge) causing standard styles to disappear.

[0] https://www.mediawiki.org/wiki/Talk:Requests_for_comment/Change_LESS_compilation_library

[1] exception 'Less_Exception_Chunk' with message 'ParseError: Unexpected input in screen.less on line 725, column 2 723) 	margin-top: 0; 724) 	/* Only applied in IE6 * / 725) 	margin-top: -0.8em !ie; 726) 	height: 0; 727) 	overflow: hidden; 728) 	.background-image('images/watch-icons.png'); ' in ...\vendor\oyejorge\less.php\lib\Less\Parser.php:480