PHP:
Fatal error: Uncaught Error: Interface "SimplePie_Cache_Base" not found in /www/habi.gna.ch/doc/wp-includes/SimplePie/Cache/Memcache.php:57
Stack trace:
#0 {main}
thrown in /www/habi.gna.ch/doc/wp-includes/SimplePie/Cache/Memcache.php on line 57