Joomla! Documentation™

Starting with Joomla 4.0 we changed / removed and added some options to the core extensions that might affect template providers.

Errors reported

Some options have been removed or changed in comparision to 3.x

Versions affected

General Information

What is the cause

This is an expected behavior as of Joomla 4.0

The following options has been changed comparing the current 3.10-dev vs. 4.0-dev (as of 09.09.2020):

com_config/config/default:
  Fields added in J4:
    request/request/controller

com_config/templates/default:
  Fields added in J4:
    request/request/controller

com_contact/categories/default:
  Fields removed in J4:
    params/contact/presentation_style

com_contact/category/default:
  Fields added in J4:
    params/advanced/contacts_display_num
  Fields removed in J4:
    params/contact/presentation_style

com_contact/contact/default:
  Fields removed in J4:
    params/params/presentation_style

com_contact/featured/default:
  Fields removed in J4:
    params/contact/presentation_style

com_content/article/default:
  Fields removed in J4:
    params/basic/show_icons
    params/basic/show_print_icon
    params/basic/show_email_icon

com_content/categories/default:
  Fields removed in J4:
    params/blog/num_columns
    params/blog/multi_column_order
    params/article/show_icons
    params/article/show_print_icon
    params/article/show_email_icon

com_content/category/blog:
  Fields added in J4:
    params/advanced/blog_class_leading
    params/advanced/blog_class
  Fields removed in J4:
    params/advanced/bloglayout
    params/advanced/num_columns
    params/advanced/multi_column_order
    params/article/show_icons
    params/article/show_print_icon
    params/article/show_email_icon

com_content/category/default:
  Fields removed in J4:
    params/article/show_icons
    params/article/show_print_icon
    params/article/show_email_icon

com_content/featured/default:
  Fields added in J4:
    params/advanced/blog_class_leading
    params/advanced/blog_class
  Fields removed in J4:
    params/advanced/num_columns
    params/advanced/multi_column_order
    params/article/show_icons
    params/article/show_print_icon
    params/article/show_email_icon

com_finder/search/default:
  Fields added in J4:
    params/basic/show_taxonomy
    params/basic/show_date

How to fix

When you have a template that supports both 3.x and 4.x please make sure that you take care of the changed parameter set.