Crash under PHP >= 8.0 when disk_free_space() is not available

In many shared hosting environments the PHP function disk_free_space() is disabled. Therefore functions/interface.php:496 thus contains the construct

function disk_space_low( $backup_size = false ) {

	$disk_space = @disk_free_space( Path::get_path() );

	if ( ! $disk_space ) {
		return false;
	}

[…]

Under PHP <= 7 the “@” in @disk_free_space( Path::get_path() ); causes disk_space_low() to return False whenever disk_free_space() is not available.

With PHP 8.0 the behavior of “@” however has changed https://www.php.net/manual/en/language.operators.errorcontrol.php#112900

For me this makes the WordPress admin panel inaccessible when BackupWordpress is installed and the PHP version of the web server is set to PHP 8.0.25 because I get the error:

An error of type E_ERROR was caused in line 498 of the file /home/www/wordpress/wp-content/plugins/backupwordpress/functions/interface.php. Error message: Uncaught Error: Call to undefined function HM\BackUpWordPress\disk_free_space() in /home/www/wordpress/wp-content/plugins/backupwordpress/functions/interface.php:498
Stack trace:
#0 /home/www/wordpress/wp-content/plugins/backupwordpress/functions/interface.php(242): HM\BackUpWordPress\disk_space_low()
#1 /home/www/wordpress/wp-includes/class-wp-hook.php(308): HM\BackUpWordPress\set_server_config_notices('')
#2 /home/www/wordpress/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)
#3 /home/www/wordpress/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#4 /home/www/wordpress/wp-admin/admin-ajax.php(45): do_action('admin_init')
#5 {main}
  thrown

With PHP 7.4.33 everything works normally.

Would be great to get this fixed! Thanks!