Warning: require(/home/.sites/75/site845/web/wp-includes/html-api/class-wp-html-processor.php): Failed to open stream: No such file or directory in /home/.sites/75/site845/web/wp-settings.php on line 264

Fatal error: Uncaught Error: Failed opening required '/home/.sites/75/site845/web/wp-includes/html-api/class-wp-html-processor.php' (include_path='.:/usr/lib/php://share/php/php:/usr/share/pear:/usr/share/php') in /home/.sites/75/site845/web/wp-settings.php:264
Stack trace:
#0 /home/.sites/75/site845/web/wp-config.php(91): require_once()
#1 /home/.sites/75/site845/web/wp-load.php(50): require_once('/home/.sites/75...')
#2 /home/.sites/75/site845/web/wp-blog-header.php(13): require_once('/home/.sites/75...')
#3 /home/.sites/75/site845/web/index.php(20): require('/home/.sites/75...')
#4 {main}
  thrown in /home/.sites/75/site845/web/wp-settings.php on line 264

Fatal error: Uncaught Error: Call to a member function set() on null in /home/.sites/75/site845/web/wp-includes/l10n.php:856
Stack trace:
#0 /home/.sites/75/site845/web/wp-includes/l10n.php(959): load_textdomain('default', '/home/.sites/75...', 'de_DE')
#1 /home/.sites/75/site845/web/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler->handle()
#3 {main}
  thrown in /home/.sites/75/site845/web/wp-includes/l10n.php on line 856