Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method WP_Feed_Cache::create() cannot be called statically in /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-includes/SimplePie/Registry.php:214
Stack trace:
#0 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-includes/class-simplepie.php(1412): SimplePie_Registry->call('Cache', 'get_handler', Array)
#1 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-content/plugins/feedwordpress/feedwordpress.php(1958): SimplePie->init()
#2 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-content/plugins/feedwordpress/syndicatedlink.class.php(102): FeedWordPress::fetch(Object(SyndicatedLink), Array)
#3 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-content/plugins/feedwordpress/syndicatedlink.class.php(141): SyndicatedLink->fetch()
#4 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-content/plugins/feedwordpress/feedwordpress.php(900): SyndicatedLink->poll(NULL)
#5 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-content/plugins/feedwordpress/feedwordpress.php(1621): FeedWordPress->update()
#6 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-includes/class-wp-hook.php(287): FeedWordPress->auto_update('')
#7 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#8 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-includes/plugin.php(484): WP_Hook->do_action(Array)
#9 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-settings.php(579): do_action('wp_loaded')
#10 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-config.php(102): require_once('/data01/virt287...')
#11 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-load.php(37): require_once('/data01/virt287...')
#12 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-blog-header.php(13): require_once('/data01/virt287...')
#13 /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/index.php(17): require('/data01/virt287...')
#14 {main}
thrown in /data01/virt28780/domeenid/www.eata.ee/htdocs/newsite/wp-includes/SimplePie/Registry.php on line 214