Prestashop PayPal SSL https Cookies

i have installed paypal v3.10 with prestashop 1.6. on create account i only require username / password. not address,city,postcode,etc. i use https. the website is https://vouchoff.com. if customer clicks into paypal and cancels, back to [login to view URL], icon-trash is missing as well as express checkout cart. also, customer cannot create account error "Parse Error, Unable to send login informations". are you interested and can you help please? thank you, Trev