A user who created a Virtualbox using a minimal CentOS installation was having issues with missing dependencies in the system and unable to edit portal folders in the file system in the WebNative Admin UI.
The problem could be related to the OS that is installed as it has only minimal resources, It advised that you install a more complete package as the problem could be related to missing dependencies. You can find CentOS packages on their vault.
Once you are creating the virtual machine, please ensure you select Linux and Other Linux 64-bit for the version, please refer to the image:
Then, select Server with GUI in the software options and from there also include Java, file sharing server, and MariaDB. After that please follow the installation process for Xinet.