Advanced Custom Fields Pro 6.4.0.1

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.