Use version 1.2.1 together with Chameleon 2.1.0 otherwise the styles will not load.
Place the following in your "comploser.local.json" file:
"scssphp/scssphp": "~1.2.0"
Place "scssphp/scssphp": "~1.2.0" in your "comploser.local.json" file.