Fatal error

I’m using this plugin https://wordpress.org/plugins/astra-sites/

And I’m seeing a fatal error in my site when they do this

$schedules[ $this->identifier . 'cron_interval' ] = array( 'interval' => MINUTE_IN_SECONDS * $interval, /* translators: %d are the minutes. */ 'display' => sprintf( _( 'Every %d Minutes', 'st-importer', 'astra-sites' ), $interval ),
);

the fatal error displayed is

PHP Fatal error: Uncaught TypeError: Unsupported operand types: string * int in /wp-content/plugins/astra-sites/inc/lib/starter-templates-importer/importer/helpers/wp-background-process.php:442

When i print this MINUTE_IN_SECONDS the value of that is:

ghostkit_run_breakpoints_processing_cron_interval

Do you know what the problem could be?