Hi Okkhalid
Please check with your hosting provider that you meet the JobMonster Theme Recommended PHP Configuration Limits.
- upload_max_filesize = 128M
- post_max_size = 128M
- max_execution_time = 60
If you have CPanel or Plesk you can update these settings in your PHP settings.
I would suggest increasing the max_execution_time, max_input_time and upping the Memory_Limit to get a better performance out of your host for your website.
The default for most servers is after 30 seconds it will timeout or give a 404 error message. Increasing to 60 or more as suggested should resolve your issue.