Ticket #59090: 59090.diff

src/wp-content/themes/twentytwenty/functions.php

@@ -430 +430 @@
                 wp_add_inline_style( 'twentytwenty-block-editor-styles', $custom_css );
         }
 
-        // Enqueue the editor script.
-        wp_enqueue_script( 'twentytwenty-block-editor-script', get_theme_file_uri( '/assets/js/editor-script-block.js' ), array( 'wp-blocks', 'wp-dom' ), wp_get_theme()->get( 'Version' ), true );
+        // Enqueue the editor script and unregister the squared button block style.
+        if ( version_compare( $GLOBALS['wp_version'], '5.3', '<' ) ) {
+                wp_enqueue_script( 'twentytwenty-block-editor-script', get_theme_file_uri( '/assets/js/editor-script-block.js' ), array( 'wp-blocks', 'wp-dom' ), wp_get_theme()->get( 'Version' ), true );
+        }
 }
 
 add_action( 'enqueue_block_editor_assets', 'twentytwenty_block_editor_styles', 1, 1 );