* New - REST API now supports the comment route for displaying ACF fields.

* Fix - ACF now validates access to option page field values when accessing via field keys the same way as field names. [View More](https://www.advancedcustomfields.com/resources/acf-field-functions/#non-acf-data)

* Fix - REST API now correctly validates fields for POST update requests

* Fix - Fixed an issue where invalid field types caused an error during REST API requests

* Fix - Fixed a PHP warning when duplicating an empty field group

* Fix - Fixed a bug preventing block duplication detection changing an ACF Block’s ID if it was nested deeper than one level inside another block

* Fix - Fixed a bug where the `acf-block-preview` wrapper might not appear around a block if it was saved in edit mode

* i18n - Updated several translations from user contributions (Thanks to Dariusz Zielonka, Mikko Kekki and Alberto!)

* Fix - Fixed several Select2.js conflicts with other plugins

* Fix - Fixed an issue where block name sanitization could change valid block names containing double hyphens

* Fix - Fixed an issue where blocks with integer IDs could fail to load example field data

Fix - Fixed a bug when accessing field values for options pages registered with a custom post_id

* Enhancement - Added "acf/admin/license_key_constant_message" filter to allow changing of the "Your license key is defined in wp-config.php" message

* Fix - Added warning for when get_field() or similar functions are called before ACF has initialized. [Learn more](https://www.advancedcustomfields.com/resources/acf-field-functions/)

* Fix - Fixed fields not appearing on user REST API endpoints if their field group location was set to a user form other than "all"

* Fix - Fixed warning in REST API if a custom field type did not have the "show_in_rest" property

* Fix - Fixed an error that could occur if value of WYSIWYG field was not a string

* New - Fields can now be viewed and updated with the WordPress REST API (props @mishterk)

* New - License key can now be defined in code with the "ACF_PRO_LICENSE" constant

* Enhancement - Improved error handling for expired or deactivated licenses

* Enhancement - Improved support for various block editor features, such as block styles and padding/spacing

* Enhancement - Added support for using WordPress "Screen Options" to hide field groups in Classic Editor

* Enhancement - Support filters adding custom classes on date and time field inputs

* Enhancement - Support filtering ACF shortcode attributes (with the "shortcode_atts_acf" filter)

* Fix - Removed usages of PHP "extract()" function

* Fix - Fixed a security issue with user field

* Fix - Fixed a security issue with "acf_get_value()"

* Fix - Correctly set ".acf-block-preview" wrapper when previewing a block in auto mode

* Fix - Resolved an issue with select2 rendering for nav menu fields

* Fix - Fixed an issue with file validation that occurred when removing a file that failed validation

* Fix - Fixed a notice in "acf_prepare_field()"

* Fix - Prevented an issue where setting an empty string for the return format of date and time fields would cause JS errors

* Fix - Fix issues with conditional logic for multi-select fields (props @bhujagendra-ishaya)

* Fix - Added support for Google Maps schema change which prevented Google Maps fields from correctly saving the city for some areas

* Fix - Fixed an issue where removing the collapsed property of a repeater prevents viewing previously collapsed rows

* i18n - Updated Polish Translations (props @webnatural)

* Dev - Formatted JavaScript to WordPress code standards

* Fix - Fixed block duplication issues which created blocks with duplicate block IDs

* Fix - Fixed an issue with ACF errors displaying in the media library outside of ACF fields

* Fix - Changed label of "Enable Opacity?" to "Allow transparency" in the colour picker

* Fix - Revert "style" attributes of ACF Blocks to 5.9.x behaviour for template compatibility

* Fix - Allow safe HTML inside select2 field labels

* Fix - Don't render the "acf-block-preview" div when preloading blocks in edit mode

* Fix - Fixed conflict with WooCommerce loading SelectWoo which is not directly compatible with Select2.

* Enhancement - Improved security by running all user-generated content through `wp_kses()` by default

* Enhancement - New ACF Blocks features

    * Switched to v2 of the Blocks API for WordPress 5.6+

    * Block preloading now enabled by default

    * Block preloading now supports blocks set to "Edit" mode

    * Add support for full height alignment setting

* Enhancement - Added setting to color picker field to enable an opacity slider

* Enhancement - Allow deletion of first field group location rule if multiple rules have been added thanks to Arthur Shlain

* Fix - Fixed vulnerability with `acf_shortcode()` where users with subscriber role could view arbitrary ACF data, thanks to Keitaro Yamazaki

* Fix - Fixed vulnerability where users with subscriber role could move fields and view field groups, thanks to Keitaro Yamazaki

* Fix - Fixed issue where fields in legacy widgets weren't saving in new widget block editor

* Fix - Fixed issue with custom field validation in scheduled posts

* Fix - Fixed warnings thrown by clone field if the cloned field group is empty

* Fix - Fixed issue where Select2 search input wouldn't have focus in WordPress 5.8+

* Fix - Fixed issue with Select2 value sorting when Yoast SEO is installed

* Fix - Fixed deprecation warnings in block editor in WordPress 5.6+

* i18n - Updated Swedish translation thanks to Erik Betshammar