Hi,
It's probably that the Joomla installer hit the max execution time restriction configured in your php.ini while extracting the files of the HikaShop zip (because there are many of them to extract).
The solution is to either:
- increase the max execution time of your php.ini
- extract the install zip of the latest version on your local computer, upload the folders and files extracted in the tmp folder of your Joomla via FTP, and then run the "install from folder" of the Joomla installer on the folder where you uploaded all the files / folder of the zip. That way, no file extraction needed and the system will directly copy the files and proceed to the update.