After a cron job is triggered, WorkCron starts connecting the server of this cron job's URL and then receiving data from the server. Generally, these actions can be done soon if the network between servers of WorkCron and yours is good and the cron script of your URL does not process a big task. But if the network is not good or your cron script is handling a big task, the time that the cron job costs could be long, and once it's longer than a specific time period, WorkCron will abort the current execution of this cron job. This "specific time period" is called cron job timeout limit. Different plans have different timeout limits. To make sure your scripts have enough time to perform, you can choose higher configuration plan.