Thread:Skin talk:Chameleon/PHP Fatal error: Class 'Skins\\Chameleon\\Hooks\\SetupAfterCache' not found

Hi, I'm trying to install Chameleon on a fresh mediawiki. Mediawiki itself seems to be ok.

The section 'Installation' seems to be missing a lot. First, after step 4 ( ...) Special:Version does not show the skin - because it is not required in LocalSettings.php. After adding Bootstrap and Chameleon to the file I get an empty page... The apache error log shows this line

[...] PHP Fatal error: Class 'Skins\\Chameleon\\Hooks\\SetupAfterCache' not found in [...]/skins/chameleon/Chameleon.php on line 87

Obviously something's missing - but what? Where do I have to start digging? (I'm not a PHP person)