Upgrade from starter to essentials

-- HikaShop version -- : Hikashop essentials
-- Joomla version -- : 3.4.8 Stable
-- PHP version -- : 5.4
-- Browser(s) name and version -- : FF Chrome
-- Error-message(debug-mod must be tuned on) -- : internal server error 500

Hi,

I'm getting "internal server error 500"

I checked all the write permissions - they're all good.

my Hikashop stopped working after the attempted upgrade, I am now deleting the whole site and using an akeeba backup from this morning, before I attempt the upgrade again, what could be the possible problems ?
thanks

SOLVED

I had hikashop installed in a sub-folder, I think .. it needs to be in root (Public_html) to allow the upgrade,

I reinstalled in root,
I unzipped the upgrade files locally,
uploaded them into tmp,
then installed from folder

worked, but it might be worth checking if there is an error updating to subfolders

Hello,
You should probably try to install it via FTP as it's described on the documentation : www.hikashop.com/support/support/documen...o-install.html#blank

I have downloaded the essentials v.26.1 as a zip file on my local machine.
Is it possible to install to a remote Joomla instance?
My details are as follows

HP Version 5.6.20
Web Server LiteSpeed
WebServer to PHP Interface litespeed
Joomla! Version Joomla! 3.5.1 Stable [ Unicorn ] 05-April-2016 22:45 GMT