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Fatal error: Uncaught TypeError: set_exception_handler(): Argument #1 ($callback) must be a valid callback or null, class "hitupdate\app\core\logger" not found in /www/htdocs/w0143f01/wordpress_update_server/wpu2.heinsen-it.de/wpu.heinsen-it.de/index/index.php:65 Stack trace: #0 /www/htdocs/w0143f01/wordpress_update_server/wpu2.heinsen-it.de/wpu.heinsen-it.de/index/index.php(65): set_exception_handler('hitupdate\\app\\c...') #1 {main} thrown in /www/htdocs/w0143f01/wordpress_update_server/wpu2.heinsen-it.de/wpu.heinsen-it.de/index/index.php on line 65