Error in Hikashop

-- url of the page with the problem -- : http://repuesteracyr-pe
-- HikaShop version -- : 4.0.0
-- Joomla version -- : 3.8.13
-- PHP version -- : 7.1.18
-- Browser(s) name and version -- : google chrome 69.0.3497.100
-- Error-message(debug-mod must be tuned on) -- : 0 syntax error, unexpected 'if' (T_IF), expecting function (T_FUNCTION) or const (T_CONST)

recenting i upgrade my version of joomla and hikashop
and, now appearme the follow message

0 syntax error, unexpected 'if' (T_IF), expecting function (T_FUNCTION) or const (T_CONST)

and not permit me add more articles or modify anything...
how i do to resolve this issue?

I found that adding } at the end of line 647 in administrator\components\com_hikashop\classes\field.php will fix it.