Fatal Error in class-wp-theme-json-resolver

I have WordPress 5.8.1 with default theme Twenty Twenty and all plugins are disabled and I am getting an error while accessing widgets or customize theme. this error in the logs:

[30-Sep-2021 15:08:42 UTC] PHP Fatal error:  Uncaught Error: Call to undefined function _wp_array_set() in C:\wamp64\www\em9\wp-includes\class-wp-theme-json-resolver.php:230
Stack trace:
#0 C:\wamp64\www\em9\wp-includes\class-wp-theme-json-resolver.php(250): WP_Theme_JSON_Resolver::translate(Array)
#1 C:\wamp64\www\em9\wp-includes\class-wp-theme-json-resolver.php(312): WP_Theme_JSON_Resolver::get_core_data()
#2 C:\wamp64\www\em9\wp-includes\block-editor.php(294): WP_Theme_JSON_Resolver::get_merged_data(Array)
#3 C:\wamp64\www\em9\wp-includes\class-wp-customize-widgets.php(843): get_block_editor_settings(Array, Object(WP_Block_Editor_Context))
#4 C:\wamp64\www\em9\wp-includes\class-wp-hook.php(303): WP_Customize_Widgets->enqueue_scripts('')
#5 C:\wamp64\www\em9\wp-includes\class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array)
#6 C:\wamp64\www\em9\wp-includes\plugin.php(470): WP_Hook->do_action(Array)
#7 C:\wamp64\www\em9\wp-admin\customize.php(123): do_action('customize_contr...')
#8 {main}
  thrown in C:\wamp64\www\em9\wp-includes\class-wp-theme-json-resolver.php on line 230