ok now i reinstalled the english core version and voila everything is fine ….
so maybe the german one was buggy
thanks paul for your reply
hi paul,
thanks for your fast answer
yes i already disabled all plugins and used another customized theme… and this is what i exactly didi i manually updated wordpress and then i updated the core files again….
still the problem remains
PHP Fatal error: Class ‘WP_Customize_Filter_Setting’ not found in /…/…../…/wp-includes/class-wp-customize-manager.php on line 4854
