Antivirus (Clamav) Can't save mode socket in Admin panel

šŸ± Features & apps
1

Hi,
My server info:
Operating system: CentOS 7
Apache 2.4.6
PHP version : 7.1.8
ClamAV : v0.99.2 clamd daemon installed on host listening on local Unix socket /var/run/clamd.scan/clamd.sock
NextCloud version : 12.0.2.

I just try to configure ā€˜file_antivirusā€™ apps.
Getting the apps from git hub (branch master) and enabled through apps panel works fine.
I changed owner/group of files_antivirus apps to apache:apache to be readable by the web server.
Unfortunatly, i canā€™t change the config of the app from ā€˜antivirus Configurationā€™ menus.
No matter which mode i choose, Daemon, Daemon (Socket),ā€¦ ClamAV remains in ā€˜Executableā€™ Mode.
This make use of clamscan (which is very very slow analyzing files) indeed the unix socket in daemon mode.
Seems like it is not save even when i click save. This append only for this app
May be a problem on right access on files ?.. but where ?
Has anyone ever encountered this kind of problem?