Internal Server Error - Hikashop Products Menu

-- HikaShop version -- : 2.5.0 Business
-- Joomla version -- : 3.4.3
-- PHP version -- : 5.4.43
-- Browser(s) name and version -- : Chrome Version 43.0.2357.130 m
-- Error-message(debug-mod must be tuned on) -- : Failed to load resource: the server responded with a status of 500 (Internal Server Error)

Failed to load resource: the server responded with a status of 500 (Internal Server Error)

Specific to the Hikashop > Components > Products only

Hello,
That's probably a server issue, but can you :
- Activate the Joomla debug mode ("Administration->Global configuration->System->Debug System/Language")
- Set the "error reporting" option of the Joomla configuration to "maximum"
- Test it again so that you can see if it display an error message which will help you to understand from what your issue is coming.
Thanks.