I have installed : Bootstrap 1.2.3 and Chameleon 1.61beta (updated by composer) and I get the error
Fatal error: Uncaught Exception: L:\xammp7025\htdocs\mw1274/skins/chameleon/skin.json does not exist! in L:\xammp7025\htdocs\mw1274\includes\registration\ExtensionRegistry.php:106 Stack trace: #0 L:\xammp7025\htdocs\mw1274\includes\GlobalFunctions.php(152): ExtensionRegistry->queue('L:\\xammp7025\\ht...') #1 L:\xammp7025\htdocs\mw1274\LocalSettings.php(142): wfLoadSkin('chameleon') #2 L:\xammp7025\htdocs\mw1274\includes\WebStart.php(124): require_once('L:\\xammp7025\\ht...') #3 L:\xammp7025\htdocs\mw1274\index.php(40): require('L:\\xammp7025\\ht...') #4 {main} thrown in L:\xammp7025\htdocs\mw1274\includes\registration\ExtensionRegistry.php on line 106
other bootstrap skins function but only with 'require once...'