To install a new module on Prestashop:
- Enter your backoffice and select Modules > modules from the menu
- Click on the button "Add a new module"
- Choose the file to load and click on the button "Upload this module"
- Install the module from your own Prestashop panel, looking for the "Electronic Invoicing Prestalia"
IMPORTANT Once installed, be sure to check that all the einvoicingprestalia files and folders have the proper writing permissions (644 for files, 755 or 777 for folders, depending on your server).