Warning: Trying to access array offset on value of type bool in /usr/www/users/agapeq/wp-includes/theme.php on line 2241

Fatal error: Uncaught Error: Call to undefined function create_function() in /usr/www/users/agapeq/wp-content/plugins/testimonials-by-woothemes/classes/class-woothemes-widget-testimonials.php:270
Stack trace:
#0 /usr/www/users/agapeq/wp-content/plugins/testimonials-by-woothemes/woothemes-testimonials.php(19): require_once()
#1 /usr/www/users/agapeq/wp-settings.php(305): include_once('/usr/www/users/...')
#2 /usr/www/users/agapeq/wp-config.php(91): require_once('/usr/www/users/...')
#3 /usr/www/users/agapeq/wp-load.php(37): require_once('/usr/www/users/...')
#4 /usr/www/users/agapeq/wp-blog-header.php(13): require_once('/usr/www/users/...')
#5 /usr/www/users/agapeq/index.php(17): require('/usr/www/users/...')
#6 {main}
  thrown in /usr/www/users/agapeq/wp-content/plugins/testimonials-by-woothemes/classes/class-woothemes-widget-testimonials.php on line 270