Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "_wp_footnotes_kses_init" not found or invalid function name in /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/class-wp-hook.php:308
Stack trace:
#0 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#1 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/plugin.php(517): WP_Hook->do_action()
#2 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/pluggable.php(48): do_action()
#3 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/user.php(3622): wp_set_current_user()
#4 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/pluggable.php(70): _wp_get_current_user()
#5 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/capabilities.php(873): wp_get_current_user()
#6 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-content/plugins/wpforms-lite/src/Access/Capabilities.php(46): current_user_can()
#7 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-content/plugins/wpforms-lite/includes/functions/access.php(215): WPForms\Access\Capabilities->current_user_can()
#8 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-content/plugins/wpforms-lite/src/Admin/Addons/AddonsCache.php(25): wpforms_current_user_can()
#9 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-content/plugins/wpforms-lite/src/Helpers/CacheBase.php(48): WPForms\Admin\Addons\AddonsCache->allow_load()
#10 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-content/plugins/wpforms-lite/src/WPForms.php(300): WPForms\Helpers\CacheBase->init()
#11 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/class-wp-hook.php(308): WPForms\WPForms->WPForms\{closure}()
#12 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#13 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/plugin.php(517): WP_Hook->do_action()
#14 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-content/plugins/wpforms-lite/src/WPForms.php(259): do_action()
#15 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/class-wp-hook.php(308): WPForms\WPForms->objects()
#16 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters()
#17 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/plugin.php(517): WP_Hook->do_action()
#18 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-settings.php(486): do_action()
#19 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-config.php(96): require_once('/var/www/vhosts...')
#20 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-load.php(50): require_once('/var/www/vhosts...')
#21 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-blog-header.php(13): require_once('/var/www/vhosts...')
#22 /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/index.php(17): require('/var/www/vhosts...')
#23 {main}
  thrown in /var/www/vhosts/mifevents.com/webspace/httpdocs/mifevents.com-wordpress/wp-includes/class-wp-hook.php on line 308