I am a Root but the permissions given to Prestashop to carry out their work are not the correct ones.
It is a hosting created with bitnami with an instance of Prestashop in Google Cloud. There are many problems of permissions in Prestashop with the instances that they deploy. In order to upload files or modify them I have to log in as a root from a console and put 777 to the file I want to modify through FTP and then change the permissions again. It is a fudge.
From Prestashop you have to give a warning to Bitnami because it is creating a bad reputation in the operation of Prestashop, because they create instances without permission for the proper functioning of Prestashop.
Users are caught in problems of permissions, updates that can not be done correctly, modules that do not work, javascript that does not run ... etc ... etc ..