Fatal error: Uncaught Error: Call to undefined function imagecreatetruecolor() in /var/www/hitb-haxpo/wp-content/plugins/really-simple-captcha/really-simple-captcha.php:110
Stack trace:
#0 /var/www/hitb-haxpo/wp-content/plugins/expo/components/expo_form_builder.php(141): ReallySimpleCaptcha->generate_image()
#1 /var/www/hitb-haxpo/wp-content/plugins/expo/components/expo_shortcode.php(384): Expo_Form_Builder->create_form()
#2 /var/www/hitb-haxpo/wp-includes/shortcodes.php(345): Expo_Shortcode->exhibitors_register_shortcode()
#3 [internal function]: do_shortcode_tag()
#4 /var/www/hitb-haxpo/wp-includes/shortcodes.php(223): preg_replace_callback()
#5 /var/www/hitb-haxpo/wp-includes/class-wp-hook.php(298): do_shortcode()
#6 /var/www/hitb-haxpo/wp-includes/plugin.php(203): WP_Hook->apply_filters()
#7 /var/www/hitb-haxpo/wp-includes/post-template.php(240): apply_filters()
#8 /var/www/hitb-haxpo/wp-content/themes/Tyler/page.php(14): the_content()
#9 /var/www/hitb-haxpo/wp-includes/template-loader.php(74): include('/var/www/hitb- in /var/www/hitb-haxpo/wp-content/plugins/really-simple-captcha/really-simple-captcha.php on line 110
