The importer log shows an error while adding a field (e.g. name)

The importer takes PrestaShop validation into account. For example, the product name field, when adding a product manually through the admin panel, is validated according to the guidelines given for that field = next to the product name field there is the following information: "Forbidden characters ;=#{}".
If the imported product in the file has any of the above characters in its name, PrestaShop will not save such a product. The importer works the same way - if the data in the file does not pass PrestaShop's built-in validation, the importer will not import that data.
If you receive logs like:

• Skipped some fields because they are invalid: name, available_now, available_later
  
• Not imported because: Property Product->name is not valid

Make sure the field mentioned in the logs in your file does not contain forbidden characters. You can check the forbidden characters and the maximum number of characters available for a given field by hovering the mouse over the field name in the PrestaShop admin panel.