Hi @headleander ,
Just go to root/wp-includes/blocks/archives.php and find the function in line 119
unction register_block_core_archives() {
register_block_type_from_metadata(
__DIR__ . '/archives',
array(
'render_callback' => 'render_block_core_archives',
)
);
}
add_action( 'init', 'register_block_core_archives' );
Just comment that function and the site will work again.