diff --git a/wp-admin/includes/class-theme-installer-skin.php b/wp-admin/includes/class-theme-installer-skin.php
index 91c3a50088..cfbc8a6ecb 100644
--- a/wp-admin/includes/class-theme-installer-skin.php
+++ b/wp-admin/includes/class-theme-installer-skin.php
@@ -115,7 +115,7 @@ class Theme_Installer_Skin extends WP_Upgrader_Skin {
 
 		$install_actions = array();
 
-		if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {
+		if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) && ! $theme_info->is_block_theme() ) {
 			$customize_url = add_query_arg(
 				array(
 					'theme'  => urlencode( $stylesheet ),
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e530d4d3d0..7c0678ee2f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-alpha-52801';
+$wp_version = '6.0-alpha-52802';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.