Hello Saguaros
We haven't installed any extensions yet for this reason.
This happened after we installed the Quickstart template.
It showed us to update Joomla and 2 extensions.
The T3 framework and Hikashop starter.
We did updated the others with no problems.
If we go to update the Hikashop the error occures.
We tried it 3 times and we reinstalled the website from the beggining.