CAPTCHA Image is generated but it is not Display

Same here. The only advice for you: delete this plugin and use Fast Secure Contact Form plugin which do the same, is more simple, easy and works!

Hello I am hacine problems displaying my image. Web site is https://www.charliguatemala.com/home/contacto/

Thanks for your help

turn on debugging and paste the logs here, wordpress log file is under wp-content I think.