Doesn't open some pages on the website. CMS Drupal/ Need to fix

Feb 24 12:45:24 vh174 apache_error: vraschyoska.ru [Mon Feb 24 12:45:24 2020] [error] [pid 14500] sapi_apache2.c(325): [client 92.53.115.234:43448] PHP Fatal error: Call to undefined function filter_xss_bad_protocol() in /home/u/usatyi/vraschyoska.ru/public_html/includes/common.inc on line 1053