AntiVirus App: unexpected scan results for test content with clamav executable

I’m issuing the same problem than AntiVirus App: unexpected scan results for test content

I using nextcloud 31 on a docker instance for dev purpose.
I installed clamav inside the docker instance via apt-get install (I’m on arm architecture so I have no docker image for clamav deamon)
I configure my antivirus app with clamav Executable.
When I run the file antivirus app save, I have the message “AntiVirus App: unexpected scan results for test content” and no logs added on clamav (I enabled it on the configuration files).
I already tried to reinstall it as said in the older post but without success.

Does someone have the same problem during the latests years ?
Does someone have an idea of what I can do ?
Thanks for your read
Regards