By phenaproxima on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
11.1.x
Introduced in version: 
11.1.0
Issue links: 
https://www.drupal.org/node/3379725
Description: 

Previously, it was possible for a block using the search_block_form plugin to have the page_id setting be an empty string, which would signify that the block should use the default search page. For example:

id: olivero_search_form_narrow
theme: olivero
region: primary_menu
weight: -4
plugin: search_form_block
settings:
  id: search_form_block
  label: 'Search form (narrow)'
  label_display: '0'
  provider: search
  page_id: '' <---- EMPTY STRING

As of #3379725: Make Block config entities fully validatable, this isn't allowed. To use the default search page, page_id has to be NULL:

id: olivero_search_form_narrow
theme: olivero
region: primary_menu
weight: -4
plugin: search_form_block
settings:
  id: search_form_block
  label: 'Search form (narrow)'
  label_display: '0'
  provider: search
  page_id: null <---- EXPLICIT NULL
Impacts: 
Module developers
Site templates, recipes and distribution developers