Fatal error: Uncaught Error: Undefined constant "WP_CACHE_KEY_SALT" in /customers/1/3/b/mogroach.de/httpd.www/wp-content/plugins/w3-total-cache/Util_Debug.php:63
Stack trace:
#0 /customers/1/3/b/mogroach.de/httpd.www/wp-content/plugins/w3-total-cache/PgCache_ContentGrabber.php(2277): W3TC\Util_Debug::log_filename('pagecache')
#1 /customers/1/3/b/mogroach.de/httpd.www/wp-content/plugins/w3-total-cache/PgCache_ContentGrabber.php(217): W3TC\PgCache_ContentGrabber::log('start, can_cach...')
#2 /customers/1/3/b/mogroach.de/httpd.www/wp-content/advanced-cache.php(42): W3TC\PgCache_ContentGrabber->process()
#3 /customers/1/3/b/mogroach.de/httpd.www/wp-settings.php(98): include('/customers/1/3/...')
#4 /customers/1/3/b/mogroach.de/httpd.www/wp-config.php(111): require_once('/customers/1/3/...')
#5 /customers/1/3/b/mogroach.de/httpd.www/wp-load.php(50): require_once('/customers/1/3/...')
#6 /customers/1/3/b/mogroach.de/httpd.www/wp-blog-header.php(13): require_once('/customers/1/3/...')
#7 /customers/1/3/b/mogroach.de/httpd.www/index.php(17): require('/customers/1/3/...')
#8 {main}
  thrown in /customers/1/3/b/mogroach.de/httpd.www/wp-content/plugins/w3-total-cache/Util_Debug.php on line 63