Error while accessing WP-Admin

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Whenever i try to access my wp-admin dashboard panel, i get htis error:

**Fatal error**: Uncaught Error: Call to undefined function apply\_filters() in /srv/www/vhosts/michits.ch/httpdocs/wp-includes/error-protection.php:139 Stack trace: #0 /srv/www/vhosts/michits.ch/httpdocs/wp-includes/error-protection.php(82): wp\_is\_fatal\_error\_handler\_enabled() #1 /srv/www/vhosts/michits.ch/httpdocs/wp-settings.php(64): wp\_register\_fatal\_error\_handler() #2 /srv/www/vhosts/michits.ch/httpdocs/wp-config.php(72): require\_once(‘/srv/www/vhosts…’) #3 /srv/www/vhosts/michits.ch/httpdocs/wp-load.php(50): require\_once(‘/srv/www/vhosts…’) #4 /srv/www/vhosts/michits.ch/httpdocs/wp-admin/admin.php(34): require\_once(‘/srv/www/vhosts…’) #5 /srv/www/vhosts/michits.ch/httpdocs/wp-admin/index.php(10): require\_once(‘/srv/www/vhosts…’) #6 {main} thrown in **/srv/www/vhosts/michits.ch/httpdocs/wp-includes/error-protection.php** on line **139**

Can anyone help?

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