Ondernemen in onzekere tijden

Fatal error: Uncaught Error: Call to undefined function tribe_is_event() in /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-content/themes/enfold/config-events-calendar/config.php:457 Stack trace: #0 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-includes/class-wp-hook.php(324): avia_events_modify_event_publish_date() #1 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters() #2 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-content/themes/enfold/includes/loop-index.php(447): apply_filters() #3 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-includes/template.php(812): require('...') #4 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-includes/template.php(745): load_template() #5 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-includes/general-template.php(206): locate_template() #6 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-content/themes/enfold/single.php(52): get_template_part() #7 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-includes/template-loader.php(106): include('...') #8 /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-blog-header.php(19): require_once('...') #9 /home/vertelvr/domains/vertelvrouwe.nl/public_html/index.php(17): require('...') #10 {main} thrown in /home/vertelvr/domains/vertelvrouwe.nl/public_html/wp-content/themes/enfold/config-events-calendar/config.php on line 457