Fatal error: Uncaught Exception: Failed to parse time string (--) at position 0 (-): Unexpected character in /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/plugins/the-holiday-calendar/helpers/helper.class.php:156
Stack trace:
#0 /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/plugins/the-holiday-calendar/helpers/helper.class.php(156): DateTime->__construct()
#1 /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/plugins/the-holiday-calendar/helpers/string-helper.class.php(19): thc_helper::formatDate()
#2 /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/plugins/the-holiday-calendar/the-holiday-calendar.php(230): thc_string_helper::convert_dates_to_single_line()
#3 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/class-wp-hook.php(310): the_holiday_calendar::override_title()
#4 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/plugin.php(205): WP_Hook->apply_filters()
#5 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/post-template.php(174): apply_filters()
#6 /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/plugins/simple-social-buttons/simple-social-buttons.php(1613): get_the_title()
#7 /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/plugins/simple-social-buttons/simple-social-buttons.php(1578): SimpleSocialButtonsPR->og_get_title()
#8 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/class-wp-hook.php(310): SimpleSocialButtonsPR->add_meta_tags()
#9 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters()
#10 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action()
#11 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/general-template.php(3053): do_action()
#12 /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/themes/i-max/header.php(51): wp_head()
#13 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/template.php(785): require_once('...')
#14 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/template.php(720): load_template()
#15 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/general-template.php(48): locate_template()
#16 /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/themes/i-max/single.php(9): get_header()
#17 /var/www/vhosts/asvdronten.nl/httpdocs/wp-includes/template-loader.php(106): include('...')
#18 /var/www/vhosts/asvdronten.nl/httpdocs/wp-blog-header.php(19): require_once('...')
#19 /var/www/vhosts/asvdronten.nl/httpdocs/index.php(17): require('...')
#20 {main}
thrown in /var/www/vhosts/asvdronten.nl/httpdocs/wp-content/plugins/the-holiday-calendar/helpers/helper.class.php on line 156