Bulk AI Post Creator Satus Failed

Hi, I have a plugin on a website I host with Hostinger. I set max_execution_time to 1000. Nevertheless, the bulk creator always ends with Status Failed. However, there is no specific error listed in the Activity Log. I once ran into a 524 Cloudflare error while running the plugin. But I don't know how to solve it and if it is really so. It happened when the plugin was running and I wanted to go to the Activity log.