registration page redirects to a 404 page not found after submit

-- HikaShop version -- : 3.0.0
-- Joomla version -- : 3.6.5
-- PHP version -- : 5.5.9
-- Browser(s) name and version -- : firefox 51

i am using the hikashop registration form for registating at our site using the url www.pim.gr/index.php/hikashop-menu-for-hikashop-registration when all data is entered and a submit button is being pressed the registration page is redirecting to www.pim.gr/index.php/hikashop-menu-for-h...ctivate_page?lang=el with a 404 page Page not found : activate_page.
Activation email is being and also the user is created in joomla users.Also a strange thing is that i get an email of a new order created but without any data.
From search around and reading i have also activated URL where you will be redirected when the cart is empty : to www.pim.gr but still nothing.Please i need your help on this.

I have the same problem, after registration it direct to 404 not found : activate_page....
And I try to reinstall hikashop the problem is solved.

What can I do, If i had update from hika 2.x to 3.2 and i see 404 Not Found error when i click regestration confirmation link? I don't have personalization on email, but i have personalization of views.

I can't reinstall hikashop or remove personalization.

in 3.0.1 - was ok, links work ok
in 3.1.1 - was ok, links work ok
in 3.2.0- error regestration link don't work
in 3.2.1 - error regestration link don't work

Joomla - 3.8.0

After click in activation link I see error page but count is activated...
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I also see that error occurs only when i register form checkout. When I send registration form from main menu, everything works ok.

works (regestration from menu):

index.php?option=com_hikashop&ctrl=user&task=activate&activation=aa4a3691640a45f5864de84dfb77c6615&infos=eyJwYXNzIjoiemsyMzc0QDN4IiwidXNlcm5hbWUiOiJhcnR1cl96aWVsaW5za2lfAbzIucGwifQ%3D%3D&id=17&Itemid=339&lang=pl&page=user


don't work (regestration from checkout):

index.php?option=com_hikashop&ctrl=user&task=activate&activation=826550cef1c05e9c34cfbf1879c884857&infos=eyJwYXNzIjoiemsyMzc0Q5DN4IiwidXNlcm5hbWUiOiJhcnR1cl96aWVsaW5za2lAbzIucGwifQ%3D%3D&id=18&Itemid=341&lang=pl&page=checkout