Setting Facebook and edit email

Hi, I have 2 problems with the setting of Facebook, when I activate the test mode the check box doesn’t appear on the product page and in addition the button “Add to cart” doesn’t work . So impossible to check if it works before submitting it to Facebook validation.

I have a problem with emails, I would like to set up the automatic generation of coupons but in the email editor there is no in the drag and drop “Coupon”