Registration add vendor/register in url after error message

-- HikaShop version -- : 3.2.2
-- HikaMarket version -- : 2.0.1
-- Joomla version -- : 3.8.5
-- PHP version -- : 7.1.7
-- Browser(s) name and version -- : CHROME
-- Error-message(debug-mod must be tuned on) -- : Invalid Token

Hello,

To register a vendor on the website, I use the Vendor edition menu.
The url looks like .../register

If I forget the passwords or/and the paypal email address or whatever, the url change to .../register/vendor/register

Sometimes I get a white page (Invalid Token) at the end.
This part is really unpredictable (Invalid Token) and I think I fixed it by updating the ReCaptcha keys, but do you know why and how to fix the url change (.../register/vendor/register) ?

Thank you,