vendor error editing his product

-- HikaShop version -- : 2.6.2 starter
-- HikaMarket version -- : 1.6.7
-- Joomla version -- : 3.5.1
-- PHP version -- : 5.6.12
-- Browser(s) name and version -- : safari9.1
-- Error-message(debug-mod must be tuned on) -- : Invalid address: Silviu Iliuta

The Page you are looking for doesn't exist or an other error occurred.
Go back, or head over to the home page to choose a new direction.

When a vendor write the description for his product and want to apply or save changes thefollowing error occur:

0
Invalid address: Silviu Iliuta

The Page you are looking for doesn't exist or an other error occurred.
Go back, or head over to the home page to choose a new direction.

How can I solve this issue?
Regards,
Mihnea