Fatal error: Uncaught Error: Call to undefined function Thrive_Dashboard\Font_Library\wp_theme_has_theme_json() in /customers/c/0/f/karolienrector.be/httpd.www/wp-content/plugins/thrive-visual-editor/thrive-dashboard/inc/font-library/classes/Main.php:64
Stack trace:
#0 /customers/c/0/f/karolienrector.be/httpd.www/wp-content/plugins/thrive-visual-editor/thrive-dashboard/inc/font-library/classes/Main.php(43): Thrive_Dashboard\Font_Library\Main->get_font_storage_strategy()
#1 /customers/c/0/f/karolienrector.be/httpd.www/wp-content/plugins/thrive-visual-editor/thrive-dashboard/inc/hooks.php(38): Thrive_Dashboard\Font_Library\Main->init()
#2 /customers/c/0/f/karolienrector.be/httpd.www/wp-content/plugins/thrive-visual-editor/thrive-dashboard/inc/hooks.php(58): tve_font_library()
#3 /customers/c/0/f/karolienrector.be/httpd.www/wp-includes/class-wp-hook.php(307): tve_dash_init_action('')
#4 /customers/c/0/f/karolienrector.be/httpd.www/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)
#5 /customers/c/0/f/karolienrector.be/httpd.www/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#6 /customers/c/0/f/karolienrector.be/httpd.www/wp-settings.php(587): do_action('init')
#7 /customers/c/0/f/karolienrector.be/httpd.www/wp-config.php(118): require_once('/customers/c/0/...')
#8 /customers/c/0/f/karolienrector.be/httpd.www/wp-load.php(50): require_once('/customers/c/0/...')
#9 /customers/c/0/f/karolienrector.be/httpd.www/wp-blog-header.php(13): require_once('/customers/c/0/...')
#10 /customers/c/0/f/karolienrector.be/httpd.www/index.php(17): require('/customers/c/0/...')
#11 {main}
  thrown in /customers/c/0/f/karolienrector.be/httpd.www/wp-content/plugins/thrive-visual-editor/thrive-dashboard/inc/font-library/classes/Main.php on line 64