The ACT software requires a working directory. Here the software creates and updates files for background jobs, caching, and other tasks. The software needs create and write access to this working directory.
In the ACT_config.php file, we have provided a default location for your working directory. It is: /opt/viewer_jobs. You have to provide the correct access by running the chmod command as shown.
Make sure web access is not allowed to this directory
At least 0.5 Gigabyte of space is recommended for your working directory