recaptcha - another captcha [SOLVED]

I am trying to use this component. My clients abandoned the project and now they want to try to use it. Ok. The recaptcha is not working when the shopper purchases an item. The registration form stops working. I think that it needs to load the captcha plugin. The procedure is stopped.
Please would you suggest me the "OPTION" to force the buyer to make login? In other words I am searching the settings to deny the cart for user not registered. Only registered can buy, but I DO NOT WANT to use ESHOP registration panel. The step for registration is not needed since it is not working. Guests cannot buy. Thanks.

Hello gianluca,

Thank you for submitting the question here. Please submit a new ticket to EShop category to send me the super admin account to your site so I can help you to check.

Sincerely, Giang

I solved by myself because I found an error in mootools. If we use joomla 3.x and we have mootools code active, since recaptcha changed, it stops to work. There is a correction to do about Mootools code in Joomla.
I attach a link below to do the changes and it worked for me. Now the plugin works.
CLICK HERE TO READ THE ARTICLE

Dear gianluca,

That's the solution. Thank you for sharing.

Sincerely, Giang