[warning] Schema errors for bootstrap_layout_builder.layout_option.[layout-option] with the following errors: [configuration]:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Sequence

Created on 12 July 2025, 18 days ago

Problem/Motivation

When installing this module in a boilerplate Drupal 11.2.x website I am getting a long list of error messages complaining about a missing configuration key default_breakpoints in several different configuration files.

Here is the entire error output:

 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_2_25_75 with the following errors: bootstrap_layout_builder.layout_option.blb_col_2_25_75:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_2_75_25 with the following errors: bootstrap_layout_builder.layout_option.blb_col_2_75_25:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_2_full_width with the following errors: bootstrap_layout_builder.layout_option.blb_col_2_full_width:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_2_two_equal_columns with the following errors: bootstrap_layout_builder.layout_option.blb_col_2_two_equal_columns:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_3_25_25_50 with the following errors: bootstrap_layout_builder.layout_option.blb_col_3_25_25_50:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_3_25_50_25 with the following errors: bootstrap_layout_builder.layout_option.blb_col_3_25_50_25:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_3_50_25_25 with the following errors: bootstrap_layout_builder.layout_option.blb_col_3_50_25_25:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_3_full_width with the following errors: bootstrap_layout_builder.layout_option.blb_col_3_full_width:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_3_three_equal_columns with the following errors: bootstrap_layout_builder.layout_option.blb_col_3_three_equal_columns:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_4_2_4_2_4 with the following errors: bootstrap_layout_builder.layout_option.blb_col_4_2_4_2_4:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_4_2_4_4_2 with the following errors: bootstrap_layout_builder.layout_option.blb_col_4_2_4_4_2:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_4_4_2_2_4 with the following errors: bootstrap_layout_builder.layout_option.blb_col_4_4_2_2_4:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_4_4_4_2_2 with the following errors: bootstrap_layout_builder.layout_option.blb_col_4_4_4_2_2:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_4_four_equal_columns with the following errors: bootstrap_layout_builder.layout_option.blb_col_4_four_equal_columns:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_4_full_width with the following errors: bootstrap_layout_builder.layout_option.blb_col_4_full_width:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_5_2_2_2_2_4 with the following errors: bootstrap_layout_builder.layout_option.blb_col_5_2_2_2_2_4:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_5_2_2_2_4_2 with the following errors: bootstrap_layout_builder.layout_option.blb_col_5_2_2_2_4_2:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_5_2_2_4_2_2 with the following errors: bootstrap_layout_builder.layout_option.blb_col_5_2_2_4_2_2:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_5_2_4_2_2_2 with the following errors: bootstrap_layout_builder.layout_option.blb_col_5_2_4_2_2_2:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_5_4_2_2_2_2 with the following errors: bootstrap_layout_builder.layout_option.blb_col_5_4_2_2_2_2:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_5_full_width with the following errors: bootstrap_layout_builder.layout_option.blb_col_5_full_width:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_6_full_width with the following errors: bootstrap_layout_builder.layout_option.blb_col_6_full_width:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.
 [warning] Schema errors for bootstrap_layout_builder.layout_option.blb_col_6_six_equal_columns with the following errors: bootstrap_layout_builder.layout_option.blb_col_6_six_equal_columns:default_breakpoints variable type is NULL but applied schema class is Drupal\Core\Config\Schema\Sequence. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out <a href="https://www.drupal.org/docs/drupal-apis/configuration-api/configuration-schemametadata">the documentation</a>.

Steps to reproduce

Just install the module on a boilerplate Drupal installation.

Proposed resolution

--

Remaining tasks

--

User interface changes

--

API changes

--

Data model changes

--

🐛 Bug report
Status

Needs work

Version

2.2

Component

Code

Created by

🇧🇷Brazil mabho Rio de Janeiro, RJ

Live updates comments and jobs are added and updated live.
Sign in to follow issues

Merge Requests

Comments & Activities

Production build 0.71.5 2024